WPF停止鼠标按下事件获得应用重点

Question

在的WinForms我用下面的代码块被点击停止应用程序获得焦点：

private const int WM_MOUSEACTIVATE = 0x0021; 
private const int MA_NOACTIVATEANDEAT = 0x0004; 

protected override void WndProc(ref Message m) 
{ 
    if (m.Msg == WM_MOUSEACTIVATE) 
    { 
     m.Result = (IntPtr)MA_NOACTIVATEANDEAT; 
     return; 
    } 
    base.WndProc(ref m); 
} 

是否有任何替代这在WPF应用程序？我可以使用HwndSource吗？以下是我迄今为止（WM_MOUSEACTIVATE不能单独工作的要求和应用程序仍然获得焦点）：

protected override void OnSourceInitialized(EventArgs e) 
    { 
     base.OnSourceInitialized(e); 
     HwndSource source = PresentationSource.FromVisual(this) as HwndSource; 
     source.AddHook(WndProc); 
    } 

private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled) 
{ 
    // Handle messages... 
    int WM_MOUSEACTIVATE = 0x0021; 
    int WM_LBUTTONDOWN = 0x0201; //513 
    int WM_LBUTTONUP = 0x0202; //514 
    int WM_LBUTTONDBLCLK = 0x0203; //515 
    if (msg == WM_MOUSEACTIVATE || msg == MA_NOACTIVATEANDEAT || msg == WM_LBUTTONDOWN || msg == WM_LBUTTONUP || msg == WM_LBUTTONDBLCLK) 
    { 
     handled = true; 
    } 
    return IntPtr.Zero; 
} 

我怎样才能得到消息的结果？

Answer 1

通过使用解决：

private IntPtr WndProc(IntPtr hwnd, int msg, IntPtr wParam, IntPtr lParam, ref bool handled) 
{ 
    // Handle messages... 
    int WM_MOUSEACTIVATE = 0x0021; 
    if (msg == WM_MOUSEACTIVATE) 
    { 
     handled = true; 
     return new IntPtr(MA_NOACTIVATEANDEAT); 
    } 
    return IntPtr.Zero; 
}