.net - 如何在 WPF 中将窗口保持在最后？

Question

我有一个生成全屏窗口的小型 .NET 程序。我想将此窗口保留在最后面的窗口（即其他窗口应在其顶部打开，并且单击时不应出现在最前面）。在 Windows Presentation Foundation 下有什么实用的方法可以做到这一点吗？

Answer 1

据我所知，您必须 P/Invoke 才能正确执行此操作。调用SetWindowPos函数，指定窗口句柄和HWND_BOTTOM标志。

这会将您的窗口移动到 Z 顺序的底部，并防止它遮挡其他窗口。

示例代码：

Private Const SWP_NOSIZE As Integer = &H1
Private Const SWP_NOMOVE As Integer = &H2
Private Const SWP_NOACTIVATE As Integer = &H10

<DllImport("user32.dll", CharSet:=CharSet.Auto)> _
Private Shared Function SetWindowPos(hWnd As IntPtr, hWndInsertAfter As IntPtr,
                                     X As Integer, Y As Integer,
                                     cx As Integer, cy As Integer,
                                     uFlags As Integer) As Boolean
End Function


Public Sub SetAsBottomMost(ByVal wnd As Window)
    ' Get the handle to the specified window
    Dim hWnd As IntPtr = New WindowInteropHelper(wnd).Handle

    ' Set the window position to HWND_BOTTOM
    SetWindowPos(hWnd, New IntPtr(1), 0, 0, 0, 0,
                 SWP_NOSIZE Or SWP_NOMOVE Or SWP_NOACTIVATE)
End Sub