Win32Exception -类已存在

Question

我在产品代码中得到了Win32Exception -“类已经存在”。在我的演示项目中，相同的代码可以正常工作。会有什么问题呢？

Private Class MyClientWindow
    Inherits NativeWindow

    Public Sub New(ByVal parent As Form)

        Dim cp As CreateParams = New CreateParams()

        ' Fill in the CreateParams details.
        cp.Caption = "Parent Static Window"
        cp.ClassName = "Static"

        ' Set the position on the form
        cp.X = 0
        cp.Y = 0
        cp.Height = 0
        cp.Width = 0

        ' Specify the form as the parent.
        cp.Parent = parent.Handle

        ' Create as a child of the specified parent
        cp.Style = WS_CHILD Or WS_VISIBLE

        ' Create the actual window 
        Me.CreateHandle(cp)
    End Sub

End Class

System.ComponentModel.Win32Exception was unhandled by user code. 
ErrorCode=-2147467259,     
Message=Class already exists, 
NativeErrorCode=1410, 
StackTrace:
at System.Windows.Forms.NativeWindow.WindowClass.RegisterClass()
at System.Windows.Forms.NativeWindow.WindowClass.Create(String className, Int32 classStyle)
at System.Windows.Forms.NativeWindow.CreateHandle(CreateParams cp)

Answer 1

将类名称从"Static“更改为"STATIC”seams才能工作。我在CreateParams.ClassName Property上找到了关于这方面的评论

若要从标准按钮控件派生，请将此ClassName属性设置为" Button "