How to differ mouse click and drag?

From:

"vicky" <ziashahid123@gmail.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

19 Mar 2007 00:02:35 -0700

Message-ID:

<1174287755.596353.110580@o5g2000hsb.googlegroups.com>

Hi All!

I am having a problem regarding mouse capture. I am capturing mouse
events in my LBUTTONDOWN Handler but i am unable to differ between
click (Mouse down and UP) and drag(Mouse down -> move -> up).
When i am expecting single click windows fires mouse move too. at
first time it runs fine but for subsequent clicks it gives me msg
"Mouse L-Button UP, After Mouse Move.".

What to do now?

Following is my code in which i am capturing mouse events on
LBUTTONDOWN handler.

void CMouseCaptureView::OnLButtonDown(UINT nFlags, CPoint point)
{

   CPoint pt;
   for (;;)
   {

      MSG msg;
      ::GetMessage(&msg,NULL,0,0);

      CWnd *pwnd = AfxGetApp()->GetMainWnd();
      HWND hwnd = pwnd->GetSafeHwnd();

      switch(msg.message)
      {

      case WM_MOUSEMOVE:
         RECT rc;
         bMove = TRUE;
         pt = msg.lParam ;
         GetWindowRect(&rc);
         if(PtInRect(&rc,pt))
         {
            SetTimer(TID_POLLMOUSE,MOUSE_POLL_DELAY,NULL);
            if(hwnd != GetCapture()->GetSafeHwnd() )
            {
               SetCapture();
            }
            break;
         }
         break;

      case WM_LBUTTONUP:

         if(bMove)
         {
            bMove = FALSE;
            AfxMessageBox("Mouse L-Button UP, After Mouse Move.");
         }
         else
            AfxMessageBox("Mouse L-Button UP.");
         ReleaseCapture();
         KillTimer(TID_POLLMOUSE);
         PostMessage(WM_MOUSELEAVE,0,0L);
         break;

      case WM_TIMER:
         GetWindowRect(&rc);
         GetCursorPos(&pt);
         if(PtInRect(&rc,pt))
         {
         PostMessage(WM_MOUSEHOVER,0,0L);
         break;
         }
         ReleaseCapture();
         KillTimer(TID_POLLMOUSE);
         PostMessage(WM_MOUSELEAVE,0,0L);
         break;

      default:
         DispatchMessage(&msg);
      }//End of switch

      // release the mouse (if we still own it)
      if (GetCapture() == this) ::ReleaseCapture();

   }//End of For

   CView::OnLButtonDown(nFlags, point);
}