blocks|key|2576019|text|试一试|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2576020|HKLM\SOFTWARE\Microsoft\DevDiv\VC\Servicing\11.0|code-block|syntax|javascript|2576021|作为一个起点。我将使用它作为安装VC%2B%2B+11+(VS+2012)运行时的检查。|2576022|entityMap^0|0|0|0^^$0|@$1|2|3|4|5|6|7|K|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|L|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|M|8|@]|9|@]|A|$]]|$1|I|3|-4|5|6|7|N|8|@]|9|@]|A|$]]]|J|$]]

Try

<pre><code>HKLM\SOFTWARE\Microsoft\DevDiv\VC\Servicing\11.0
</code></pre>

as a starting point. I will be using this as a check for installing the VC++ 11 (VS 2012) runtime.

blocks|key|4302125|text|您可以在64位系统上的注册表位置：HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\11.0\VC\Runtimes\x86中检查Installed值是否为1。在会导致访问注册表项HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\11.0\VC\Runtimes\x86的代码中。请注意Wow6432Node的缺失。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4302126|在32位系统上，注册表与没有Wow6432Node的注册表相同：HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\11.0\VC\Runtimes\x86|4302127|entityMap^0|H|2B|2V|9|38|1|3K|1Z|5R|B|0|E|B|W|1Z|0^^$0|@$1|2|3|4|5|6|7|J|8|@$9|K|A|L|B|C]|$9|M|A|N|B|C]|$9|O|A|P|B|C]|$9|Q|A|R|B|C]|$9|S|A|T|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|U|8|@$9|V|A|W|B|C]|$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|H|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|I|$]]

You can check for the <code>Installed</code> value to be <code>1</code> in this registry location: <code>HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\11.0\VC\Runtimes\x86</code> on 64-bit systems. In code that would result in accessing registry key <code>HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\11.0\VC\Runtimes\x86</code>. Notice the absence of <code>Wow6432Node</code>.

On a 32-bit system the registry is the same without <code>Wow6432Node</code>: <code>HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\11.0\VC\Runtimes\x86</code>

blocks|key|2342997|text|Visual+C%2B%2B附带的引导程序包清单中没有installcheck元素。如果您将其设置为先决条件，我猜Microsoft希望始终安装它。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2342998|当然，您仍然可以调用MsiQueryProductState来检查VC+redist包是否通过MSI安装，包代码可以通过以下命令找到|2342999|wmic+product+get|code-block|syntax|javascript|2343000|在命令行中，或者如果您已经在wmic:root\cli中，请运行|2343001|product+where+"Caption+like+'%25C%2B%2B+2012%25'"|2343002|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|P|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Q|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|R|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|S|8|@]|9|@]|A|$G|H]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

There is no installcheck element in the bootstrapper package manifest shipped with Visual C++. Guess Microsoft wants to always install if you set it as a prerequisite.

Of course you can still call MsiQueryProductState to check if the VC redist package is installed via MSI, The package code can be found by running 

<pre><code>wmic product get
</code></pre>

at command line, or if you are already at wmic:root\cli, run 

<pre><code>product where "Caption like '%C++ 2012%'"
</code></pre>

blocks|key|2576250|text|不幸的是，这个简单问题的答案并不简单，但它适用于100%25的所有系统，甚至可以扩展到许多.net框架。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2576251|复杂性来自于这样一个事实，即有(并且曾经是)许多VC运行时版本，这可能导致这样的情况:尽管安装了VC10运行时，但它们的内部版本号不够新，所以您的EXE不会启动，除非您安装了所需的非常精确的运行时，或者安装了较新的运行时之一，这使得这个版本和以前的版本能够与相同的主要版本一起运行(并排地狱)。此外，如果您有64位EXE，则必须同时检查32位和64位运行时。|2576252|也就是说，要确定是否安装了EXE的运行时，唯一可靠的方法是尝试运行EXE+-或另一个EXE，该EXE与主EXE具有相同的设置，其唯一目的是不执行任何操作。只需运行(这意味着运行时已安装)或无法运行(当未安装时)。|2576253|我对需要安装VC10+32和64位运行时的安装程序执行了以下操作:安装程序尝试启动所有虚拟EXE，如果成功，则认为相应的运行时已安装。这也解决了32/64位的情况。|2576254|顺便说一句，这也可以决定是否安装了合适的.net框架，这在Windows8和10中是非常棘手的，因为可下载的内置.net+3.5支持也支持.net版本3.0和2.0+-没有这些版本的注册表条目。(更糟糕的是，你甚至不能在这里使用标准的框架安装程序，你的必须使用内置的支持并通过Windows下载它，或者使用.net+4重建你的应用程序，但那是另一回事)。|offset|length|style|BOLD|2576255|可以使用具有以下代码的项目来构建C%2B%2B虚拟可执行文件(如果需要，还可以使用64位配置)：|2576256|int+_tmain(int+argc,+_TCHAR*+argv[])
{
++++return+0;
}|code-block|syntax|javascript|2576257|记住要将项目的属性Use+of+MFC设置为Use+MFC+in+a+shared+DLL。可执行文件的大小约为4KB+-对于一个确定的结果来说，这是一个很小的代价。|2576258|为了让您的用户获得良好的安装体验，您可以执行以下操作(示例代码用于NSIS)：|2576259|Function+TryLaunchApplication
++Pop+$1+;+pathname
++nsExec::Exec+$1
++Pop+$0

++${If}+$0+==+"error"
++${OrIf}+$0+!=+0
++++Push+0
++${Else}
++++Push+1
++${EndIf}
FunctionEnd|2576260|并在函数中调用它，例如CheckRuntimes|2576261|Function+CheckRuntimes
++;+Try+to+execute+VC%2B%2B+10+application+(32+bit)
++Push+"Vc10RuntimeCheckerApp.exe"
++Call+TryLaunchApplication
++Pop+$Vc10RuntimesFound

++;+Add+64+bit+check+if+required.
++;+Remember+to+try+running+the+64+bit+EXE+only+on+a+64+bit+OS,
++;+which+requires+further+checks.

++;+Try+to+execute+.net+application
++Push+"DotNetRuntimeCheckerApp.exe"
++Call+TryLaunchApplication
++Pop+$DotNetFrameworkFound
FunctionEnd|2576262|然后启动运行时检查，例如离开欢迎页面并缓存结果，这样您就不必在用户每次单击“后退”和“下一步”按钮时重新检查。|2576263|接下来，在安装树中创建一个只读部分，并在显示Components页面之前执行的功能上预先选择或取消选择它。|2576264|这将确保每个缺少的运行时组件的安装是强制的，如果它已经存在，则跳过它。|2576265|entityMap^0|0|0|0|0|3I|1F|0|0|18|0|0|0|J|M|N|0|X|4|0|0|B|D|0|0|E|2|0|M|A|0|0^^$0|@$1|2|3|4|5|6|7|1C|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1D|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|1E|8|@]|9|@]|A|$]]|$1|F|3|G|5|6|7|1F|8|@]|9|@]|A|$]]|$1|H|3|I|5|6|7|1G|8|@$J|1H|K|1I|L|M]]|9|@]|A|$]]|$1|N|3|O|5|6|7|1J|8|@$J|1K|K|1L|L|M]]|9|@]|A|$]]|$1|P|3|Q|5|R|7|1M|8|@]|9|@]|A|$S|T]]|$1|U|3|V|5|6|7|1N|8|@$J|1O|K|1P|L|M]|$J|1Q|K|1R|L|M]]|9|@]|A|$]]|$1|W|3|X|5|6|7|1S|8|@$J|1T|K|1U|L|M]]|9|@]|A|$]]|$1|Y|3|Z|5|R|7|1V|8|@]|9|@]|A|$S|T]]|$1|10|3|11|5|6|7|1W|8|@$J|1X|K|1Y|L|M]]|9|@]|A|$]]|$1|12|3|13|5|R|7|1Z|8|@]|9|@]|A|$S|T]]|$1|14|3|15|5|6|7|20|8|@$J|21|K|22|L|M]]|9|@]|A|$]]|$1|16|3|17|5|6|7|23|8|@$J|24|K|25|L|M]]|9|@]|A|$]]|$1|18|3|19|5|6|7|26|8|@]|9|@]|A|$]]|$1|1A|3|-4|5|6|7|27|8|@]|9|@]|A|$]]]|1B|$]]

The answer to this simple questions is unfortunately not a simple one, but working in 100% of all systems, and even extendable to the numerous .net frameworks.

The complexity comes from the fact that there are (and were) many VC runtimes revisions which could lead to the case that although VC10 runtimes were installed, their build number was not recent enough so your EXE wouldn't start unless you either installed the very exact runtimes you required or one of the newer runtimes which enable this and previous versions for the same major version to run with it (the side-by-side hell).
Also, if you have a 64 bit EXE, you will have to check for both, the 32 AND 64 bit runtimes.

That said, the only reliable way to determine whether the runtimes for your EXE are installed is to attempt to run the EXE - or a another EXE which is built with the same settings as your main EXE and whose only purpose is to do - nothing. Just run (which means the runtimes are installed) or fail to run (when not installed).

I did the following for an installer which required the VC10 32 and 64 bit runtimes installed: The installer attempts to launch all dummy EXEs and if it succeeds, the corresponding runtime is considered to be installed. This also resolves the 32/64 bit scenario.

This, by the way, works also to determine if the proper .net framework is installed, which is very tricky in Windows 8 and 10, as the downloadable built-in .net 3.5 support also supports the .net versions 3.0 and 2.0 - there are no registry entries for these.
(And worse, you cannot even use the standard framework installers here, you must use the built-in support and download it via Windows, or rebuild your app with .net 4, but that's another story).

The C++ dummy EXE can be built using a project with the following code (and another one in a 64 bit configuration if necessary):

<pre><code>int _tmain(int argc, _TCHAR* argv[])
{
 return 0;
}
</code></pre>

Remember to set the project's properties Use of MFC to Use MFC in a shared DLL.
The executables will be around 4KB in size - a small price to pay for a sure result.

To give your users a nice installation experience, you could do the following (sample code is for NSIS):

<pre><code>Function TryLaunchApplication
 Pop $1 ; pathname
 nsExec::Exec $1
 Pop $0

 ${If} $0 == "error"
 ${OrIf} $0 != 0
 Push 0
 ${Else}
 Push 1
 ${EndIf}
FunctionEnd
</code></pre>

and call it in a function, e.g. CheckRuntimes

<pre><code>Function CheckRuntimes
 ; Try to execute VC++ 10 application (32 bit)
 Push "Vc10RuntimeCheckerApp.exe"
 Call TryLaunchApplication
 Pop $Vc10RuntimesFound

 ; Add 64 bit check if required.
 ; Remember to try running the 64 bit EXE only on a 64 bit OS,
 ; which requires further checks.

 ; Try to execute .net application
 Push "DotNetRuntimeCheckerApp.exe"
 Call TryLaunchApplication
 Pop $DotNetFrameworkFound
FunctionEnd
</code></pre>

Then launch the runtime check e.g. when leaving the Welcome page and cache the result, so you don't have to re-check every time the user clicks on the "Back" and "Next" button.

Next, make a read-only section in the install tree and pre-select or unselect it on the a function which is executed before the Components page is shown.

This will make sure that the installation of each missing runtime component is mandatory, and is skipped if it is already present.

blocks|key|2343747|text|自从Visual+Studio2010及更高版本停止使用WinSxS以来，只需检查%25windir%25\system32\msvcr110.dll就足够了。如果要验证是否有足够新的版本，可以检查文件版本是11.0.50727.1+(VS2012+RTM)还是11.0.51106.1+(VS2012更新1)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2343748|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

Since Visual Studio 2010 and later stopped using WinSxS, it may be enough to just check for %windir%\system32\msvcr110.dll. If you want to verify you have a new enough version, you can check whether the file version is 11.0.50727.1 (VS2012 RTM) or 11.0.51106.1 (VS2012 Update 1).

blocks|key|4212944|text|我遇到这个问题是为了在WiX创建的C%2B%2B安装程序中检查Visual+MSI可再发行包的上下文中寻找答案。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4212945|我不喜欢GUID随版本和操作系统而变化的方式，所以我最终创建了一个用C#编写的自定义操作来检查Visual+C%2B%2B+redistributable。|4212946|下面的一切都是专门针对Visual+C%2B%2B+2015+Redistributable+(x64)的，但它可以很容易地针对任何版本进行修改。|4212947|using+Microsoft.Deployment.WindowsInstaller;
using+Microsoft.Win32;

namespace+CustomActions
{
++++public+class+DependencyChecks
++++{
++++++++[CustomAction]
++++++++public+static+ActionResult+IsVC2015RedistInstalled(Session+session)
++++++++{
++++++++++++session.Log("Begin+Visual+C%2B%2B+2015+Redistributable+installation+check.");

++++++++++++var+dependenciesKey+=+Registry.LocalMachine.OpenSubKey("SOFTWARE\\Classes\\Installer\\Dependencies");

++++++++++++foreach(var+subKey+in+dependenciesKey.GetSubKeyNames())
++++++++++++{
++++++++++++++++var+dependency+=+dependenciesKey.OpenSubKey(subKey);
++++++++++++++++var+displayName+=+(string)dependency.GetValue("DisplayName");
++++++++++++++++if(displayName+!=+null)
++++++++++++++++{
++++++++++++++++++++if+(displayName.Contains("Microsoft+Visual+C%2B%2B+2015+Redistributable+(x64)"))
++++++++++++++++++++{
++++++++++++++++++++++++session.Log("Visual+C%2B%2B+2015+Redistributable+is+installed.");
++++++++++++++++++++++++return+ActionResult.Success;
++++++++++++++++++++}
++++++++++++++++}
++++++++++++}

++++++++++++session.Log("Visual+C%2B%2B+2015+Redistributable+is+not+installed.");
++++++++++++session.Message(InstallMessage.Error,+new+Record(1,+"This+application+requires+Visual+C%2B%2B+2015+Redistributable.+Please+install,+then+run+this+installer+again.+https://www.microsoft.com/en-us/download/details.aspx?id=53587"));
++++++++++++return+ActionResult.Failure;
++++++++}
++++}
}|code-block|syntax|javascript|4212948|然后在wxs文件中|4212949|<Binary+Id='VC2015RedistCheck'+SourceFile='!(wix.ResourcesDir=resources)\CustomActions.CA.dll'/>
++++<CustomAction
++++++Id='VC2015RedistCheckAction'
++++++Execute='immediate'
++++++BinaryKey='VC2015RedistCheck'
++++++DllEntry="IsVC2015RedistInstalled"
++++++Return='check'/>

<InstallExecuteSequence>
++<Custom+Action='VC2015RedistCheckAction'+After='InstallInitialize'/>
</InstallExecuteSequence>|4212950|编辑我正在使用有关创建和使用自定义操作的一些基本信息来更新此答案。|offset|length|style|BOLD|4212951|为了在安装了WiX+Toolset+Visual+Studio2017扩展的Visual+Studio2017中创建自定义操作，我使用项目模板创建了一个自定义操作(+WiX+v3的C#自定义操作项目)。|4212952|我检查了生成的项目，它似乎已经在本文的开头列出了更改：https://www.codeproject.com/Articles/132918/Creating-Custom-Action-for-WIX-Written-in-Managed，所以我在Adding+Custom+Action+to+the+Installer一节拿起了这篇文章，并对其进行了一些调整。|CODE|4212953|我做的另一件事是将项目构建所依据的.NET框架的版本更改为3.5。|4212954|我并不觉得它真的很有用，但是你也可以看到http://wixtoolset.org/documentation/manual/v3/wixdev/extensions/authoring_custom_actions.html|4212955|entityMap|0|LINK|mutability|MUTABLE|url|https://www.codeproject.com/Articles/132918/Creating-Custom-Action-for-WIX-Written-in-Managed|1|http://wixtoolset.org/documentation/manual/v3/wixdev/extensions/authoring_custom_actions.html^0|0|0|0|0|0|0|0|2|0|0|3H|11|R|2L|0|0|0|K|2L|1|0^^$0|@$1|2|3|4|5|6|7|1D|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|1E|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|1F|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|1G|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|1H|8|@]|9|@]|A|$]]|$1|M|3|N|5|H|7|1I|8|@]|9|@]|A|$I|J]]|$1|O|3|P|5|6|7|1J|8|@$Q|1K|R|1L|S|T]]|9|@]|A|$]]|$1|U|3|V|5|6|7|1M|8|@]|9|@]|A|$]]|$1|W|3|X|5|6|7|1N|8|@$Q|1O|R|1P|S|Y]]|9|@$Q|1Q|R|1R|1|1S]]|A|$]]|$1|Z|3|10|5|6|7|1T|8|@]|9|@]|A|$]]|$1|11|3|12|5|6|7|1U|8|@]|9|@$Q|1V|R|1W|1|1X]]|A|$]]|$1|13|3|-4|5|6|7|1Y|8|@]|9|@]|A|$]]]|14|$15|$5|16|17|18|A|$19|1A]]|1B|$5|16|17|18|A|$19|1C]]]]

I came across this question looking for an answer in the context of checking for the Visual C++ redistributable as part of an MSI installer created by WiX.

I didn't like how the GUID's change with version and operating system, so I ended up creating a custom action written in C# to check for the Visual C++ redistributable.

Everything below is specifically for Visual C++ 2015 Redistributable (x64), but it can be easily modified for any version.

<pre><code>using Microsoft.Deployment.WindowsInstaller;
using Microsoft.Win32;

namespace CustomActions
{
 public class DependencyChecks
 {
 [CustomAction]
 public static ActionResult IsVC2015RedistInstalled(Session session)
 {
 session.Log("Begin Visual C++ 2015 Redistributable installation check.");

 var dependenciesKey = Registry.LocalMachine.OpenSubKey("SOFTWARE\\Classes\\Installer\\Dependencies");

 foreach(var subKey in dependenciesKey.GetSubKeyNames())
 {
 var dependency = dependenciesKey.OpenSubKey(subKey);
 var displayName = (string)dependency.GetValue("DisplayName");
 if(displayName != null)
 {
 if (displayName.Contains("Microsoft Visual C++ 2015 Redistributable (x64)"))
 {
 session.Log("Visual C++ 2015 Redistributable is installed.");
 return ActionResult.Success;
 }
 }
 }

 session.Log("Visual C++ 2015 Redistributable is not installed.");
 session.Message(InstallMessage.Error, new Record(1, "This application requires Visual C++ 2015 Redistributable. Please install, then run this installer again. https://www.microsoft.com/en-us/download/details.aspx?id=53587"));
 return ActionResult.Failure;
 }
 }
}
</code></pre>

Then in the wxs file

<pre><code>&lt;Binary Id='VC2015RedistCheck' SourceFile='!(wix.ResourcesDir=resources)\CustomActions.CA.dll'/&gt;
 &lt;CustomAction
 Id='VC2015RedistCheckAction'
 Execute='immediate'
 BinaryKey='VC2015RedistCheck'
 DllEntry="IsVC2015RedistInstalled"
 Return='check'/&gt;

&lt;InstallExecuteSequence&gt;
 &lt;Custom Action='VC2015RedistCheckAction' After='InstallInitialize'/&gt;
&lt;/InstallExecuteSequence&gt;
</code></pre>

Edit
I'm updating this answer with some basic info on creating and using a custom action. 

To create the custom action in Visual Studio 2017 with the WiX Toolset Visual Studio 2017 extension installed, I used the project template to create a custom action (C# Custom Action Project for WiX v3). 

I checked the generated project and it seemed to already have the changes listed at the beginning of this article: <a href="https://www.codeproject.com/Articles/132918/Creating-Custom-Action-for-WIX-Written-in-Managed" rel="nofollow noreferrer">https://www.codeproject.com/Articles/132918/Creating-Custom-Action-for-WIX-Written-in-Managed</a> so I picked that article up at the section <code>Adding Custom Action to the Installer</code> and followed it through with some tweaks. 

One other thing that I did was change the version of the .NET framework the project is built against to 3.5.

I didn't find it really useful but you can also see <a href="http://wixtoolset.org/documentation/manual/v3/wixdev/extensions/authoring_custom_actions.html" rel="nofollow noreferrer">http://wixtoolset.org/documentation/manual/v3/wixdev/extensions/authoring_custom_actions.html</a>

blocks|key|4302170|text|对我来说，这个位置很有效:+HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DevDiv\vc\Servicing\11.0\RuntimeMinimum\Version|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4302171|在安装软件包后检查您的版本，并将其作为安装程序中的条件。(安装VCred后，我的设置为11.0.50727+)。|4302172|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

For me this location worked:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\DevDiv\vc\Servicing\11.0\RuntimeMinimum\Version

Check what version you have after you installed the package and use that as a condition in your installer. (mine is set to 11.0.50727 after installing VCred).

blocks|key|2343172|text|只需转到“控制面板”>“程序和功能”，它们都会在那里列出。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2343173|我不是专家，与人们的回答(检查注册表)相比，这个答案非常简单，所以我不确定它是否是正确的答案，但它确实对我起到了作用。|2343174|​|2343175|📷|atomic|offset|length|2343176|2343177|entityMap|0|IMAGE|mutability|IMMUTABLE|imageUrl|https://ask.qcloudimg.com/http-save/yehe-900000/8a9ea134f9a228a92768532e60418b3d.jpeg|imageAlt^0|0|0|0|0|1|0|0|0^^$0|@$1|2|3|4|5|6|7|U|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|V|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|W|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|X|8|@]|9|@$I|Y|J|Z|1|10]]|A|$]]|$1|K|3|E|5|6|7|11|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|12|8|@]|9|@]|A|$]]]|M|$N|$5|O|P|Q|A|$R|S|T|-4]]]]

Just go to Control Panel > Programs and Features, and they all appear listed there.

I'm no expert and this answer is pretty simple compared to what people are answering (checking registry), so I'm not sure if it's the correct answer but it did the trick for me.

<img src="https://i.stack.imgur.com/pzO5o.jpg" alt="Programs and Features">

blocks|key|4302174|text|if+RegRead("HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\10.0\VC\VCRedist\x86","Installed")+=+0+Then
++if+RegRead("HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\11.0\VC\Runtimes\x86","Installed")+=+0+Then|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|4302175|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>if RegRead("HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\10.0\VC\VCRedist\x86","Installed") = 0 Then
 if RegRead("HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\11.0\VC\Runtimes\x86","Installed") = 0 Then
</code></pre>

blocks|key|4302384|text|我已经用InnoSetup成功地做到了这一点。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4302385|我检查了注册表项是否存在：|4302386|HKLM\SOFTWARE\Microsoft\VisualStudio\11.0\VC\Runtimes|offset|length|style|CODE|4302387|如果卸载，它将不存在。如果已安装，则存在。|4302388|顺便说一句，它也可能在Wow6432Node中：|4302389|HKLM\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\11.0\VC\Runtimes|4302390|entityMap^0|0|0|0|1H|0|0|0|0|1T|0^^$0|@$1|2|3|4|5|6|7|R|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|S|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|T|8|@$F|U|G|V|H|I]]|9|@]|A|$]]|$1|J|3|K|5|6|7|W|8|@]|9|@]|A|$]]|$1|L|3|M|5|6|7|X|8|@]|9|@]|A|$]]|$1|N|3|O|5|6|7|Y|8|@$F|Z|G|10|H|I]]|9|@]|A|$]]|$1|P|3|-4|5|6|7|11|8|@]|9|@]|A|$]]]|Q|$]]

I've succeded doing this with InnoSetup.

I checked the existence of registry key:

<code>HKLM\SOFTWARE\Microsoft\VisualStudio\11.0\VC\Runtimes</code>

If uninstalled, it does not exist. If installed, it exists.

By the way, it could also be in the Wow6432Node:

<code>HKLM\SOFTWARE\Wow6432Node\Microsoft\VisualStudio\11.0\VC\Runtimes</code>

blocks|key|4302528|text|通过MsiQueryProductState检查产品的安装状态相当于直接检查注册表，但是您仍然需要ProductCode的GUID。|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|4302529|正如在其他地方提到的，这些方法的一个缺点是每个更新都有自己的ProductCode！|4302530|值得庆幸的是，微星公司提供了一个标识产品“家族”的UpgradeCode。您可以使用orca打开其中一个MSI来提取此信息。例如，VS2015的可再发行版本的UpgradeCode是{65E5BD06-6392-3027-8C26-853107D3CF1A}|style|CODE|4302531|您可以使用MsiEnumRelatedProducts获取该UpgradeCode的所有产品ID。实际上，由于每次redist更新都会替换前一次更新，因此这将只产生一个ProductCode+-例如用于VS2015更新2+x86的{B5FC62F5-A367-37A5-9FD2-A6E137C0096F}。|4302532|无论如何，您都可以通过MsiGetProductInfo、INSTALLPROPERTY_VERSIONSTRING等检查版本...)或类似的功能，以与您想要的版本进行比较，例如检查是否有相同或更高的版本。|4302533|请注意，在C%2B%2B应用程序中，如果要计算二进制文件，还可以使用_VC_CRT_MAJOR_VERSION、_VC_CRT_MINOR_VERSION和_VC_CRT_BUILD_VERSION+--这样就可以确定构建二进制文件时使用的#include+<crtversion.h>版本。|4302534|entityMap|0|LINK|mutability|MUTABLE|url|https://msdn.microsoft.com/en-us/library/windows/desktop/aa370363(v=vs.85).aspx|1|https://msdn.microsoft.com/en-us/library/windows/desktop/aa370854(v=vs.85).aspx)|2|https://msdn.microsoft.com/en-us/library/windows/desktop/aa372375(v=vs.85).aspx|3|https://msdn.microsoft.com/en-us/library/windows/desktop/aa370103(v=vs.85).aspx|4|https://msdn.microsoft.com/en-us/library/windows/desktop/aa370130(v=vs.85).aspx)(productCode^0|2|K|0|1D|B|1|0|0|2J|12|P|B|2|0|37|12|5|M|3|0|B|H|4|0|U|L|1G|L|22|L|38|N|0^^$0|@$1|2|3|4|5|6|7|15|8|@]|9|@$A|16|B|17|1|18]|$A|19|B|1A|1|1B]]|C|$]]|$1|D|3|E|5|6|7|1C|8|@]|9|@]|C|$]]|$1|F|3|G|5|6|7|1D|8|@$A|1E|B|1F|H|I]]|9|@$A|1G|B|1H|1|1I]]|C|$]]|$1|J|3|K|5|6|7|1J|8|@$A|1K|B|1L|H|I]]|9|@$A|1M|B|1N|1|1O]]|C|$]]|$1|L|3|M|5|6|7|1P|8|@]|9|@$A|1Q|B|1R|1|1S]]|C|$]]|$1|N|3|O|5|6|7|1T|8|@$A|1U|B|1V|H|I]|$A|1W|B|1X|H|I]|$A|1Y|B|1Z|H|I]|$A|20|B|21|H|I]]|9|@]|C|$]]|$1|P|3|-4|5|6|7|22|8|@]|9|@]|C|$]]]|Q|$R|$5|S|T|U|C|$V|W]]|X|$5|S|T|U|C|$V|Y]]|Z|$5|S|T|U|C|$V|10]]|11|$5|S|T|U|C|$V|12]]|13|$5|S|T|U|C|$V|14]]]]

Checking the install state for the product via <a href="https://msdn.microsoft.com/en-us/library/windows/desktop/aa370363(v=vs.85).aspx" rel="nofollow">MsiQueryProductState</a> is pretty much equivalent to checking the registry directly, but you still need the GUID for the <a href="https://msdn.microsoft.com/en-us/library/windows/desktop/aa370854(v=vs.85).aspx" rel="nofollow">ProductCode</a>.

As mentioned elsewhere, one drawback with these approaches is that each update has its own ProductCode!

Thankfully, MSI provides an <a href="https://msdn.microsoft.com/en-us/library/windows/desktop/aa372375(v=vs.85).aspx" rel="nofollow">UpgradeCode</a> which identifies a 'family' of products. You can use orca to open up one of the MSIs to extract this information. For example, the UpgradeCode for VS2015's redistributable is <code>{65E5BD06-6392-3027-8C26-853107D3CF1A}</code>

You can use <a href="https://msdn.microsoft.com/en-us/library/windows/desktop/aa370103(v=vs.85).aspx" rel="nofollow">MsiEnumRelatedProducts</a> to get all Product IDs for that UpgradeCode. In practice, since each redist update replaces the previous one, this will only yield one ProductCode - such as <code>{B5FC62F5-A367-37A5-9FD2-A6E137C0096F}</code> for VS2015 Update 2 x86.

Regardless, you can then check the version via <a href="https://msdn.microsoft.com/en-us/library/windows/desktop/aa370130(v=vs.85).aspx" rel="nofollow">MsiGetProductInfo</a>(productCode, INSTALLPROPERTY_VERSIONSTRING, ...) or similar functions to compare with the version you want, eg to check for an equivalent or later version.

Note that within a C++ application, you can also use <code>_VC_CRT_MAJOR_VERSION</code>, <code>_VC_CRT_MINOR_VERSION</code>, <code>_VC_CRT_BUILD_VERSION</code> if you <code>#include &lt;crtversion.h&gt;</code> -- this way you can determine calculate the CRT version that your binary was built with.

blocks|key|4302548|text|下面的PowerShell代码应该可以解决这个问题|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4302549|Get-ItemProperty
HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*+%7C+
Select-Object+DisplayName,+DisplayVersion,+Publisher,+InstallDate+%7C
Format-Table+–AutoSize|code-block|syntax|javascript|4302550|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

This PowerShell code should do the trick

<pre><code>Get-ItemProperty
HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\* | 
Select-Object DisplayName, DisplayVersion, Publisher, InstallDate |
Format-Table –AutoSize
</code></pre>

blocks|key|2576185|text|我需要同样的东西，虽然AFAIK不能通过编程来完成，但它对我来说是有效的。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2576186|我只是去开始-->卸载一个程序，然后向下滚动，直到我找到了VC%2B%2B+redistributable，它包括一个版本号。谷歌了一下版本号告诉我它属于VS2012+SP1|2576187|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|F|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|G|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|H|8|@]|9|@]|A|$]]]|E|$]]

I needed the same thing, and although AFAIK this cannot be done programmatically, it worked for me.

I just went to Start --> Uninstall a program, and scrolled down until I found the VC++ redistributable, which includes a version number. Googling the version number, told me it belongs to VS2012 SP1.

blocks|key|4302422|text|这是一个老问题，但这是我们自Visual+Studio+2005以来一直使用的方法，并取得了成功。我刚刚使用Visual+Studio+2012+Update+4对其进行了测试(因为我们终于要将软件从2010升级到2012)。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4302423|由于Visual+C%2B%2B可再发行软件包将它们的卸载程序注册到windows中(因此它显示在控制面板的“程序和功能”列表中)，我们只需检查注册表中卸载程序项的显示名称。|4302424|以下是相关的NSIS代码：|4302425|ReadRegStr+$0+HKLM+"SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{33d1fd90-4274-48a1-9bc1-97e33d9c2d6f}\"+"DisplayName"
StrCmp+$0+"Microsoft+Visual+C%2B%2B+2012+Redistributable+(x86)+-+11.0.61030"+vs2012redistInstalled
DetailPrint+"Microsoft+Visual+C%2B%2B+2012+Update+4+Redistributable+not+found!"
DetailPrint+"Downloading+from+www.mywebsite.com"
;+insert+applicable+download+code+here
ExecWait+'"<downloaded+redist+exe>"+/promptrestart+/passive'
vs2012redistInstalled:|code-block|syntax|javascript|4302426|请注意，由于我们的安装程序是32位exe，windows会处理确定注册表项是否实际在虚拟化Wow6432Node中，而不是上述位置，因此上面的代码在64位和32位windows安装上都有效，而不必显式地检查这两个键。|4302427|还要注意，要将上述代码更新为不同版本的VC%2B%2B+Redist，只需将注册表项路径中的GUID和显示名称更改为所需的名称即可。|4302428|虽然这可能不是推荐的方法，但在过去的10年里，它已经在运行从XP/XP64到Windows10的各种风格的windows的10,000%2B机器上工作，使用的是2005、2010、2010sp1和现在的2012u4。|4302429|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|T|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|U|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|V|8|@]|9|@]|A|$I|J]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|6|7|Y|8|@]|9|@]|A|$]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

Old question but here is the approach we have used ever since Visual Studio 2005 with success. I just tested it using Visual Studio 2012 Update 4 as well (since we are finally updating our software from 2010 to 2012). 

Since the Visual C++ Redistributable packages register their uninstaller with windows (so it shows up in the Control Panel "Programs and Features" list), we simply check for the Display Name of the uninstaller key in the registry.

Here is the relevant NSIS code:

<pre><code>ReadRegStr $0 HKLM "SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{33d1fd90-4274-48a1-9bc1-97e33d9c2d6f}\" "DisplayName"
StrCmp $0 "Microsoft Visual C++ 2012 Redistributable (x86) - 11.0.61030" vs2012redistInstalled
DetailPrint "Microsoft Visual C++ 2012 Update 4 Redistributable not found!"
DetailPrint "Downloading from www.mywebsite.com"
; insert applicable download code here
ExecWait '"&lt;downloaded redist exe&gt;" /promptrestart /passive'
vs2012redistInstalled:
</code></pre>

Note that since our installer is a 32bit exe, windows handles determining if the registry key is actually in the virtualized Wow6432Node instead of the above location so the above code works on both 64bit and 32bit windows installs without having to check both keys explicitly.

Also note that to update the above code to a different version of the VC++ Redist, simply change the GUID in the registry key path and the display name to whatever you need. 

While this may not be the recommended method, It has worked on 10,000+ machines over the past 10 years running every flavor of windows from XP/XP64 Through Windows 10 using redists for 2005, 2010, 2010sp1, and now 2012u4.

blocks|key|4212822|text|我会检查Installed的值|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4212823|HKLM\SOFTWARE\[WOW6432Node]\Microsoft\Windows\CurrentVersion\Uninstall\{VCRedist_GUID}密钥|4212824|是否存在VC%2B%2B+2012+(x86)的GUID为{33d1fd90-4274-48a1-9bc1-97e33d9c2d6f}|4212825|WOW6432Node的|unordered-list-item|4212826|取决于VC%2B%2B+redist产品|4212827|4212828|4212829|entityMap^0|4|9|0|0|2E|0|4|F|P|12|0|0|B|0|3|B|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|V|8|@$9|W|A|X|B|C]]|D|@]|E|$]]|$1|H|3|I|5|6|7|Y|8|@$9|Z|A|10|B|C]|$9|11|A|12|B|C]]|D|@]|E|$]]|$1|J|3|K|5|L|7|13|8|@$9|14|A|15|B|C]]|D|@]|E|$]]|$1|M|3|N|5|L|7|16|8|@$9|17|A|18|B|C]]|D|@]|E|$]]|$1|O|3|-4|5|6|7|19|8|@]|D|@]|E|$]]|$1|P|3|-4|5|6|7|1A|8|@]|D|@]|E|$]]|$1|Q|3|-4|5|6|7|1B|8|@]|D|@]|E|$]]]|R|$]]

I would check the <code>Installed</code> value of

<code>HKLM\SOFTWARE\[WOW6432Node]\Microsoft\Windows\CurrentVersion\Uninstall\{VCRedist_GUID}</code> key

<ul>
<li>where GUID of <code>VC++ 2012 (x86)</code> is <code>{33d1fd90-4274-48a1-9bc1-97e33d9c2d6f}</code></li>
<li><code>WOW6432Node</code> will be present or not depending on the <code>VC++ redist</code> product</li>
</ul>

blocks|key|4302628|text|大多数人遗漏的是在Windows+x64上检查密钥所需的/reg:32。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|4302629|有关此主题，请参阅Microsoft+Help+article。|4302630|下面是一个演示如何正确检查Visual+Studio2012更新4的Visual+C%2B%2B+Redistributable的脚本。|4302631|@ECHO+OFF

:Author
REM+"CREATED+BY+WAR59312"
REM+"FEB+7th+2017"

REM+Clear+Screen
CLS

TITLE+Detect+Visual+C%2B%2B+2012+Redistributables

REM+This+Batch+Script+Detects+If+Visual+C%2B%2B+Redistributable+for+Visual+Studio+2012+Update+4+Is+Installed

:DetectWindowsOS
REM+Are+We+Running+On+x86+Or+x64
IF+NOT+DEFINED+PROCESSOR_ARCHITEW6432+(
IF+%25PROCESSOR_ARCHITECTURE%25+EQU+x86+(
REM+Windows+Is+x86
GoTo+Check32Bit
)+ELSE+(
REM+Windows+Is+x64
SET+NeededFor64BitOnly=/reg:32
GoTo+Check64Bit
))+ELSE+(
REM+Windows+Is+Unknown+But+Assume+x64+To+Be+Safe
SET+NeededFor64BitOnly=/reg:32
GoTo+Check64Bit
)

:Check64Bit
REM+Checks+If+Visual+C%2B%2B+64Bit+Redistributable+for+Visual+Studio+2012+Update+4+Is+Installed
REG+QUERY+"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\11.0\VC\Runtimes\x64"+/v+"Version"+%25NeededFor64BitOnly%25+2>NUL%5E+%7C+(
++FIND+"v11.0.61030.00"+>NUL
)+&&+(
++ECHO.
++ECHO+64bit+Visual+C%2B%2B+Redistributable+for+Visual+Studio+2012+Update+4+Is+Installed
++ECHO.
++GoTo+Check32Bit
)+%7C%7C+(
+++ECHO.
+++ECHO+64bit+Visual+C%2B%2B+Redistributable+for+Visual+Studio+2012+Update+4+Is+NOT+Installed
+++ECHO.
+++GoTo+Check32Bit
)

:Check32Bit
REM+Checks+If+Visual+C%2B%2B+32Bit+Redistributable+for+Visual+Studio+2012+Update+4+Is+Installed
REG+QUERY+"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\11.0\VC\Runtimes\x86"+/v+"Version"+%25NeededFor64BitOnly%25+2>NUL%5E+%7C+(
++FIND+"v11.0.61030.00"+>NUL
)+&&+(
+++ECHO.
+++ECHO+32bit+Visual+C%2B%2B+Redistributable+for+Visual+Studio+2012+Update+4+Is+Installed
)+%7C%7C+(
+++ECHO.
+++ECHO+32bit+Visual+C%2B%2B+Redistributable+for+Visual+Studio+2012+Update+4+Is+NOT+Installed
)

:END
ECHO.
PAUSE

EXIT|code-block|syntax|javascript|4302632|entityMap|0|LINK|mutability|MUTABLE|url|https://support.microsoft.com/en-us/help/948698/you-cannot-use-the-reg.exe-utility-to-access-64-bit-registry-keys-on-a-64-bit-computer-from-a-computer-that-is-running-a-32-bit-version-of-windows-server-2003,-windows-xp,-windows-server-2008,-or-windows-vista^0|S|7|0|9|M|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|Z|8|@]|D|@$9|10|A|11|1|12]]|E|$]]|$1|H|3|I|5|6|7|13|8|@]|D|@]|E|$]]|$1|J|3|K|5|L|7|14|8|@]|D|@]|E|$M|N]]|$1|O|3|-4|5|6|7|15|8|@]|D|@]|E|$]]]|P|$Q|$5|R|S|T|E|$U|V]]]]

What most people miss is the required <code>/reg:32</code> to check for the key on Windows x64.

See <a href="https://support.microsoft.com/en-us/help/948698/you-cannot-use-the-reg.exe-utility-to-access-64-bit-registry-keys-on-a-64-bit-computer-from-a-computer-that-is-running-a-32-bit-version-of-windows-server-2003,-windows-xp,-windows-server-2008,-or-windows-vista" rel="nofollow noreferrer" title="test">Microsoft Help article</a> on this subject.

Here is a script that demonstrates how to correctly check for Visual C++ Redistributable for Visual Studio 2012 Update 4.

<pre><code>@ECHO OFF

:Author
REM "CREATED BY WAR59312"
REM "FEB 7th 2017"

REM Clear Screen
CLS

TITLE Detect Visual C++ 2012 Redistributables

REM This Batch Script Detects If Visual C++ Redistributable for Visual Studio 2012 Update 4 Is Installed

:DetectWindowsOS
REM Are We Running On x86 Or x64
IF NOT DEFINED PROCESSOR_ARCHITEW6432 (
IF %PROCESSOR_ARCHITECTURE% EQU x86 (
REM Windows Is x86
GoTo Check32Bit
) ELSE (
REM Windows Is x64
SET NeededFor64BitOnly=/reg:32
GoTo Check64Bit
)) ELSE (
REM Windows Is Unknown But Assume x64 To Be Safe
SET NeededFor64BitOnly=/reg:32
GoTo Check64Bit
)

:Check64Bit
REM Checks If Visual C++ 64Bit Redistributable for Visual Studio 2012 Update 4 Is Installed
REG QUERY "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\11.0\VC\Runtimes\x64" /v "Version" %NeededFor64BitOnly% 2&gt;NUL^ | (
 FIND "v11.0.61030.00" &gt;NUL
) &amp;&amp; (
 ECHO.
 ECHO 64bit Visual C++ Redistributable for Visual Studio 2012 Update 4 Is Installed
 ECHO.
 GoTo Check32Bit
) || (
 ECHO.
 ECHO 64bit Visual C++ Redistributable for Visual Studio 2012 Update 4 Is NOT Installed
 ECHO.
 GoTo Check32Bit
)

:Check32Bit
REM Checks If Visual C++ 32Bit Redistributable for Visual Studio 2012 Update 4 Is Installed
REG QUERY "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\VisualStudio\11.0\VC\Runtimes\x86" /v "Version" %NeededFor64BitOnly% 2&gt;NUL^ | (
 FIND "v11.0.61030.00" &gt;NUL
) &amp;&amp; (
 ECHO.
 ECHO 32bit Visual C++ Redistributable for Visual Studio 2012 Update 4 Is Installed
) || (
 ECHO.
 ECHO 32bit Visual C++ Redistributable for Visual Studio 2012 Update 4 Is NOT Installed
)

:END
ECHO.
PAUSE

EXIT
</code></pre>

blocks|key|4302731|text|+powershell脚本解决方案：|type|unstyled|depth|inlineStyleRanges|offset|length|style|BOLD|entityRanges|data|4302732|根据@kayleeFrye_onDeck答案中的信息|4302733|我已经创建了一个powershell脚本来检查和安装用户指定的版本，我没有用它做过大量的测试，但对于我自己的CI+(持续集成)场景，它工作得很好。|4302734|有关github的完整脚本和信息|4302735|我使用的方法是基于这里提供的信息检查regkey的。以下是该脚本所做工作的要点：|4302736|function+Test-RegistryValue+{
param+(
+[parameter(Mandatory=$true)]
+[ValidateNotNullOrEmpty()]$Path,
+[parameter(Mandatory=$true)]
+[ValidateNotNullOrEmpty()]$Value
)
++++try+{
++++Get-ItemProperty+-Path+"$($Path%2B$Value)"+-ErrorAction+Stop+%7C+Out-Null
++++++++return+$true
++++}
++++catch+{
++++++++return+$false
++++}
}|code-block|syntax|javascript|4302737|基于$redistInfo的检查/下载/静默安装，其中包含来自kayleeFrye的编译信息。|CODE|4302738|$redistInstalled+=+Test-RegistryValue+-Path+$redistInfo.RegPath+-Value+$redistInfo.RegValue
if($redistInstalled+-eq+$False)+{
++++Invoke-WebRequest+-Uri+$redistInfo.DownloadUrl+-OutFile+$downloadTargetPath
++++Start-Process+-FilePath+$downloadTargetPath+-ArgumentList+"$($redistInfo.SilentInstallArgs)"+-Wait+-NoNewWindow+%7C+Wait-Process
}|4302739|完整的脚本和更多信息可在github上找到|4302740|欢迎任何人贡献，如果我有时间，我会做更广泛的脚本测试，并不断尝试添加新的包，因为这里添加了信息。|4302741|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/JimWolff/PowershellVsRedistInstaller|1^0|0|I|0|0|0|2|6|0|0|0|0|2|B|0|0|C|6|1|0|0^^$0|@$1|2|3|4|5|6|7|1A|8|@$9|1B|A|1C|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|1D|8|@]|D|@]|E|$]]|$1|H|3|I|5|6|7|1E|8|@]|D|@]|E|$]]|$1|J|3|K|5|6|7|1F|8|@]|D|@$9|1G|A|1H|1|1I]]|E|$]]|$1|L|3|M|5|6|7|1J|8|@]|D|@]|E|$]]|$1|N|3|O|5|P|7|1K|8|@]|D|@]|E|$Q|R]]|$1|S|3|T|5|6|7|1L|8|@$9|1M|A|1N|B|U]]|D|@]|E|$]]|$1|V|3|W|5|P|7|1O|8|@]|D|@]|E|$Q|R]]|$1|X|3|Y|5|6|7|1P|8|@]|D|@$9|1Q|A|1R|1|1S]]|E|$]]|$1|Z|3|10|5|6|7|1T|8|@]|D|@]|E|$]]|$1|11|3|-4|5|6|7|1U|8|@]|D|@]|E|$]]]|12|$13|$5|14|15|16|E|$17|18]]|19|$5|14|15|16|E|$17|18]]]]

The powershell script solution:

Based on the information in the answer from @kayleeFrye_onDeck 

I have created a powershell script that checks and installs the versions the user specifies, i haven't done extensive testing with it, but for my own CI (Continuous Integration) scenario it work perfectly.

The full script and info on <a href="https://github.com/JimWolff/PowershellVsRedistInstaller" rel="nofollow noreferrer">github</a>

The approach i used was based on checking the regkeys based on information provided here. The following is the gist of what the script does:

<pre><code>function Test-RegistryValue {
param (
 [parameter(Mandatory=$true)]
 [ValidateNotNullOrEmpty()]$Path,
 [parameter(Mandatory=$true)]
 [ValidateNotNullOrEmpty()]$Value
)
 try {
 Get-ItemProperty -Path "$($Path+$Value)" -ErrorAction Stop | Out-Null
 return $true
 }
 catch {
 return $false
 }
}
</code></pre>

The checking/downloading/silently installing based on <code>$redistInfo</code> which contains the compiled information from kayleeFrye_onDeck's.

<pre><code>$redistInstalled = Test-RegistryValue -Path $redistInfo.RegPath -Value $redistInfo.RegValue
if($redistInstalled -eq $False) {
 Invoke-WebRequest -Uri $redistInfo.DownloadUrl -OutFile $downloadTargetPath
 Start-Process -FilePath $downloadTargetPath -ArgumentList "$($redistInfo.SilentInstallArgs)" -Wait -NoNewWindow | Wait-Process
}
</code></pre>

The full script and more information can be found on <a href="https://github.com/JimWolff/PowershellVsRedistInstaller" rel="nofollow noreferrer">github</a>

Anyone is welcome to contribute, if i have time i will do more extensive testing of the script and keep trying to add new packages as information is added here.

blocks|key|4213042|text|很难获得VC2012的所有注册表值，所以我写了一个小函数，它将遍历所有依赖项并匹配指定的版本。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|4213043|public+static+bool+IsVC2012Installed()
{
++++string+dependenciesPath+=+@"SOFTWARE\Classes\Installer\Dependencies";

++++using+(RegistryKey+dependencies+=+Registry.LocalMachine.OpenSubKey(dependenciesPath))
++++{
++++++++if+(dependencies+==+null)+return+false;

++++++++foreach+(string+subKeyName+in+dependencies.GetSubKeyNames().Where(n+=>+!n.ToLower().Contains("dotnet")+&&+!n.ToLower().Contains("microsoft")))
++++++++{
++++++++++++using+(RegistryKey+subDir+=+Registry.LocalMachine.OpenSubKey(dependenciesPath+%2B+"\\"+%2B+subKeyName))
++++++++++++{
++++++++++++++++var+value+=+subDir.GetValue("DisplayName")?.ToString()+??+null;
++++++++++++++++if+(string.IsNullOrEmpty(value))+continue;

++++++++++++++++if+(Regex.IsMatch(value,+@"C\%2B\%2B+2012"))+//here+u+can+specify+your+version.
++++++++++++++++{
++++++++++++++++++++return+true;
++++++++++++++++}
++++++++++++}
++++++++}
++++}

++++return+false;
}|code-block|syntax|javascript|4213044|依赖关系：|4213045|using+System.Text.RegularExpressions;
using+Microsoft.Win32;
using+System.Linq;|4213046|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

It is hard to get all registry values for VC 2012 so I have written a small function which will go through all dependencies and match on specified version.

<pre><code>public static bool IsVC2012Installed()
{
 string dependenciesPath = @"SOFTWARE\Classes\Installer\Dependencies";

 using (RegistryKey dependencies = Registry.LocalMachine.OpenSubKey(dependenciesPath))
 {
 if (dependencies == null) return false;

 foreach (string subKeyName in dependencies.GetSubKeyNames().Where(n =&gt; !n.ToLower().Contains("dotnet") &amp;&amp; !n.ToLower().Contains("microsoft")))
 {
 using (RegistryKey subDir = Registry.LocalMachine.OpenSubKey(dependenciesPath + "\\" + subKeyName))
 {
 var value = subDir.GetValue("DisplayName")?.ToString() ?? null;
 if (string.IsNullOrEmpty(value)) continue;

 if (Regex.IsMatch(value, @"C\+\+ 2012")) //here u can specify your version.
 {
 return true;
 }
 }
 }
 }

 return false;
}
</code></pre>

Dependencies:

<pre><code>using System.Text.RegularExpressions;
using Microsoft.Win32;
using System.Linq;
</code></pre>

blocks|key|2344167|text|我在Server2019和Windows10中对PowerShell使用了这一个内联，我不知道这是不是向后兼容。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2344168|Get-CimInstance+-Class+Win32_Product+-Filter+"Name+LIKE+'%25Visual+C%2B%2B+%25Redistri%25'"+%7C+Select+Name,+Caption,+Version|code-block|syntax|javascript|2344169|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I use this one liner for PowerShell in Server 2019 and Windows 10. I'm do not know
how backward compatible this is.
<pre><code>Get-CimInstance -Class Win32_Product -Filter &quot;Name LIKE '%Visual C++ %Redistri%'&quot; | Select Name, Caption, Version
</code></pre>

blocks|key|2342979|text|你可以在registry.Actually上搜索，我没有vs2012，但我有vs2010。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|2342980|3个平台包中的每一个都有3个不同(但非常相似)的注册表项。每个键都有一个名为“Installed”的DWORD值，其值为1。|2342981|2342982|HKLM\SOFTWARE\Microsoft\VisualStudio\10.0\VC\VCRedist\x86|unordered-list-item|2342983|HKLM\SOFTWARE\Microsoft\VisualStudio\10.0\VC\VCRedist\x64|2342984|HKLM\SOFTWARE\Microsoft\VisualStudio\10.0\VC\VCRedist\ia64|2342985|2342986|您可以使用注册表函数来执行此操作......|2342987|entityMap^0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|R|8|@]|9|@]|A|$]]|$1|D|3|-4|5|6|7|S|8|@]|9|@]|A|$]]|$1|E|3|F|5|G|7|T|8|@]|9|@]|A|$]]|$1|H|3|I|5|G|7|U|8|@]|9|@]|A|$]]|$1|J|3|K|5|G|7|V|8|@]|9|@]|A|$]]|$1|L|3|-4|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|-4|5|6|7|Y|8|@]|9|@]|A|$]]]|P|$]]

you can search in registry.Actually I do'nt have vs2012 but I have vs2010.

There are 3 different (but very similar) registry keys for each of the 3 platform packages. Each key has a DWORD value called “Installed” with a value of 1.

<ul>
<li>HKLM\SOFTWARE\Microsoft\VisualStudio\10.0\VC\VCRedist\x86</li>
<li>HKLM\SOFTWARE\Microsoft\VisualStudio\10.0\VC\VCRedist\x64</li>
<li>HKLM\SOFTWARE\Microsoft\VisualStudio\10.0\VC\VCRedist\ia64</li>
</ul>

You can use registry function for that......

How to detect if Visual C++ Redistributable for Visual Studio 2012 is installed? 

I tried Google it and nobody has asked this question, surprise!

Detect if Visual C++ Redistributable for Visual Studio 2012 is installed

翻译质量差，导致语言生硬或混乱。

没有提供实际的解决方法或示例。

解答不清晰，无法理解或解决问题。

页面排版不美观，阅读体验差。

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如何检测是否安装了Visual Studio2012的Visual C++ Redistributable？我用谷歌搜索了一下，没人问过这个问题，真让人惊讶！

问检测是否安装了Visual Studio2012的Visual C++ Redistributable
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回答 20

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