如何使这一行代码在x64 SendMessage（）上工作

Question

我们正在尝试通过代码关闭显示器，然后通过代码将其重新打开。我们发现了可以正常工作的代码，但是它使用了user32.dll，但似乎无法像其他软件一样在64位模式下工作（是的，我确实尝试了明显的user64.dll）。有什么建议吗？

'''

Public WM_SYSCOMMAND As Integer = &H112
Public SC_MONITORPOWER As Integer = &HF170
Private mainWindowHandle As IntPtr

Public Sub New(mainWindowHandle As IntPtr)
    InitializeComponent()
    Me.mainWindowHandle = mainWindowHandle
End Sub

<DllImport("user32.dll")>
Private Shared Function SendMessage(hWnd As Integer, hMsg As Integer, wParam As Integer, lParam As Integer) As Integer
End Function

Private Sub PowerOffButton_Click(sender As Object, e As RoutedEventArgs)
    SendMessage(mainWindowHandle, WM_SYSCOMMAND, SC_MONITORPOWER, 2)
End Sub

'''

Answer 1

原始海报，我们正在使用Process.GetCurrentProcess（）进行测试。一旦将其交换到Process.GetCurrentProcess（）。MainWindowHandle上，它就可以正常工作。