如何以编程方式调用应用程序菜单？

我有自定义样式的非矩形透明窗口。如何以编程方式调用应用程序菜单？

<Window 
    x:Class="TestWindow" x:Name="Window" 
    Width="350" Height="450" AllowsTransparency="True" WindowStyle="None" 
WindowStartupLocation="CenterScreen" FontSize="14 px" FontFamily="Fonts/#Tahoma" 
Background="Transparent">

我有一个标题和系统按钮的网格，并希望通过右键单击它显示应用程序菜单。目前的应用程序菜单仅通过按下ALT +空格键显示。我该如何解决这个问题？

来源

2010-02-17 raeno

因此，在Google花了两个小时后，我终于找到了解决方案。

第一步：确定RECT结构是这样的：

[StructLayout(LayoutKind.Sequential)] 
public struct RECT 
    { 
      public int Left; 
      public int Top; 
      public int Right; 
      public int Bottom; 
    }

第二步：输入2 user32.dll中的功能：

[DllImport("user32.dll")] 
private static extern IntPtr GetSystemMenu(IntPtr hWnd, bool bRevert); 

[DllImport("user32.dll")] 
public static extern int TrackPopupMenu(int hMenu, int wFlags, int x, int y, int nReserved, int hwnd, ref RECT lprc);

第三步：添加 '鼠标右键点击标题' 事件处理程序：

private void headerArea_PreviewMouseDown(object sender, MouseButtonEventArgs e) 
     {    
      switch (e.ChangedButton) 
      { 
       case MouseButton.Right: 
        { 
         // need to get handle of window 
         WindowInteropHelper _helper = new WindowInteropHelper(this); 

         //translate mouse cursor porition to screen coordinates 
         Point p = PointToScreen(e.GetPosition(this)); 

         //get handler of system menu 
         IntPtr systemMenuHandle = GetSystemMenu(_helper.Handle, false); 

         RECT rect = new RECT(); 
         // and calling application menu at mouse position. 
         int menuItem = TrackPopupMenu(systemMenuHandle.ToInt32(), 1,(int)p.X, (int) p.Y, 0, _helper.Handle.ToInt32(), ref rect); 
         break; 
        }     
      } 
     }

来源

2010-02-17 10:49:50 raeno

我不得不改变Raeno的代码如下，让菜单项工作...

//Get the hWnd, because I need to re-use it... 
int hWnd = helper.Handle.ToInt32(); 
//Change the wFlags from 1 to TPM_RIGHTBUTTON | TPM_RETURNCMD... 
int menuItem = TrackPopupMenu(systemMenuHandle.ToInt32(), TPM_RIGHTBUTTON | TPM_RETURNCMD, (int)point.X, (int)point.Y, 0, hWnd, ref rect); 

// The return value from TrackPopupMenu now need posting... 
if (menuItem != 0) 
{ 
    PostMessage(hWnd, WM_SYSCOMMAND, menuItem, 0); 
}

这就需要下面的声明...

private const int WM_SYSCOMMAND = 0x0112; 
private const int TPM_RIGHTBUTTON = 0x0002; 
private const int TPM_RETURNCMD = 0x0100; 

[DllImport("User32.dll")] 
public static extern int PostMessage(int hWnd, int Msg, int wParam, int lParam);

来源

2011-05-28 19:31:45 bwakabats

如何以编程方式调用应用程序菜单？

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