Windows SetupAPI DIF_REMOVE使用率

Question

我正在尝试使用windows SetupAPI完全禁用键盘。

目前，我可以使用DIF_REMOVE函数成功移除键盘，如下所示：

#include <windows.h>
#include <SetupAPI.h>
#include <iostream>
#include <string>

const std::string keyboard_device_instance_path("<my_path_here>"); // Win7

HDEVINFO DeviceInfoSet = ::SetupDiGetClassDevs(nullptr, nullptr, nullptr, DIGCF_ALLCLASSES | DIGCF_ALLCLASSES);

SP_DEVINFO_DATA DeviceInfoData;
::ZeroMemory(&DeviceInfoData, sizeof(SP_DEVINFO_DATA));
DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
DWORD DeviceIndex = 0;
std::vector<char> DeviceInstanceId(128, '\0');
DWORD RequiredSize = 0;

// Query all devices
while (::SetupDiEnumDeviceInfo(DeviceInfoSet, DeviceIndex++, &DeviceInfoData))
{
    // Find the Keyboard
    if (::SetupDiGetDeviceInstanceIdA(DeviceInfoSet, &DeviceInfoData, &DeviceInstanceId[0], DWORD(DeviceInstanceId.size()), &RequiredSize))
    {
        if (keyboard_device_instance_path == &DeviceInstanceId[0])
        {
            std::cout << "Breaking keyboard\n";
            if (!SetupDiCallClassInstaller(DIF_REMOVE, DeviceInfoSet, &DeviceInfoData))
            {
                std::cerr << "Failed to remove keyboard: " << ::GetLastError() << '.' << std::endl;
            }
}

禁用后，我想在满足条件时重新启用键盘。为此，我自然而然地希望“DIF_UNREMOVE”，但没有成功。

以下是尝试重新启用键盘的代码：

SP_UNREMOVEDEVICE_PARAMS UnRemoveParams;
                UnRemoveParams.ClassInstallHeader.cbSize = sizeof(SP_CLASSINSTALL_HEADER);
                UnRemoveParams.ClassInstallHeader.InstallFunction = DIF_UNREMOVE;
                UnRemoveParams.Scope = DI_UNREMOVEDEVICE_CONFIGSPECIFIC;
                UnRemoveParams.HwProfile = 0;

                if (::SetupDiSetClassInstallParams(DeviceInfoSet, &DeviceInfoData, &UnRemoveParams.ClassInstallHeader, sizeof(UnRemoveParams)))
                {
                    std::cout << "Fixing keyboard\n";
                    if (!SetupDiCallClassInstaller(DIF_UNREMOVE, DeviceInfoSet, &DeviceInfoData))
                    {
                        std::cerr << "Failed to re-enable keyboard: " << ::GetLastError() << std::endl;
                    }
                }

此代码紧跟在删除代码之后在while循环中使用。我得到一个错误“没有这样的设备安装”。执行此操作的正确方法是什么？我只能使用windowsXP支持的标头

Answer 1

我最终通过重新枚举系统硬件设备来解决这个问题，如下所示：

        DWORD pdnDevInst = 0;
        if (CM_Locate_DevNodeA(PDEVINST(&pdnDevInst), NULL, CM_LOCATE_DEVNODE_NORMAL) != CR_SUCCESS)
        {
            std::cout << "Failed to revive keyboard\n";
        }
        else if (CM_Reenumerate_DevNode(pdnDevInst, CM_REENUMERATE_NORMAL) != CR_SUCCESS)
        {
            std::cout << "Failed to revive keyboard: Renumerate dev node Error\n";
        }