IE中ocx控件的无模式对话框不接收方向键等键盘消息的问题的解决办法

在ocx控件中如果含有无模式对话框，那么当ocx在ie中显示时，往往接收不到

诸如tab，方向键和退格键。所有这些消息都被IE容器给截取了，对于这个问题，ms给出了解决方法：

首先：

  int CMyActiveXCtrl::OnCreate(LPCREATESTRUCT lpCreateStruct)
   {
      if (COleControl::OnCreate(lpCreateStruct) == -1)
         return -1;
      OnActivateInPlace (TRUE, NULL); // == UI-Activate the control
      return 0;
   }
 激活控件，以便能接收键盘消息。

其次 跟踪转发消息

  // trap keys and forward on to the control
   BOOL CMyActiveXCtrl::PreTranslateMessage(MSG* pMsg)
   {
      switch (pMsg->message)
      {
         case WM_KEYDOWN:
         case WM_KEYUP:
            switch (pMsg->wParam)
            {
               case VK_UP:
               case VK_DOWN:
               case VK_LEFT:
               case VK_RIGHT:
               case VK_HOME:
               case VK_END:

               case VK_TAB:
                 ::SendMessage (pMsg->hWnd, pMsg->message, pMsg->wParam, pMsg->lParam);
                  // Windowless controls won't be able to call SendMessage.
                  // Instead, just respond to the message here.
                  return TRUE;
            }
            break;
      }
      return COleControl::PreTranslateMessage(pMsg);
   }

注意用send而不要用post

其他参考： http://support.microsoft.com/kb/q168777/

http://www.microsoft.com/msj/0795/dilascia/dilascia.aspx