Windows Mobile开发快捷菜单问题

今天在开发群里又有人问到ppc上如何长按弹出快捷菜单。

与windows不同的是，ppc并不依靠响应WM_RBUTTONDOWN消息来实现，而是在WM_LBUTTONDOWN来处理。说来也不奇怪，ppc上根本就没有右键。

以下是正确的代码：

......

case WM_LBUTTONDOWN：

  {
   SHRGINFO shrg;
   shrg.cbSize = sizeof(shrg);
   shrg.hwndClient = m_hWnd;
   shrg.ptDown.x = LOWORD(lParam);
   shrg.ptDown.y = HIWORD(lParam);
   shrg.dwFlags = SHRG_RETURNCMD;

   CPoint point;
   point.x = shrg.ptDown.x;
   point.y = shrg.ptDown.y;

   if(::SHRecognizeGesture(&shrg) == GN_CONTEXTMENU)//长按键消息
      {
       CMenu menu;
       menu.LoadMenu(IDR_MENU_DOWN);

       CMenu *pPopupMenu = menu.GetSubMenu(0);
       
       ClientToScreen(&point);

       pPopupMenu->TrackPopupMenu(TPM_LEFTALIGN,point.x,point.y,this);
      }

}

......