mfc单击某个程序中的某个按钮

自学MFC三天，从网上也找了很多的资料，实现了点击某个程序中的CALL按钮的功能

（用spy++ 来查询相关按钮的句柄、TITLE等）

代码如下：

void CqqView::OnLButtonDown(UINT nFlags, CPoint point)
{
 // TODO: 在此添加消息处理程序代码和/或调用默认值
 ::CWnd *pWnd;
 pWnd = CWnd::FindWindow(NULL,_T("XXXXXX"));
 HWND callHwnd = pWnd->GetSafeHwnd();
 callHwnd = pWnd->m_hWnd;
 //::EnumWindows((WNDENUMPROC)EnumWindowsProc,1);

 HWND hb=::FindWindowEx(callHwnd,NULL,NULL,_T("63055087"));
 if(hb == NULL)
 {
  MessageBox(_T("Error"));
  //hb = (HWND)000206B4;
 }
 else
 {
  HWND hcallbutton = ::FindWindowEx(hb,NULL,NULL,_T("call"));
  if(hcallbutton == NULL)
  {
   MessageBox(_T("Error"));
  }
  else
  {
   /*::CWnd * windowcall = CWnd::FromHandle(hcallbutton);
   windowcall->SetWindowTextW(_T("call"));*/
   while(true)
   {
       ::SendMessage(hcallbutton, WM_LBUTTONDOWN,NULL,NULL);
                ::SendMessage(hcallbutton, WM_LBUTTONUP,NULL,NULL);
    Sleep(30000);
   }

   /*UINT DlgID = ::GetDlgCtrlID(m_hWnd);
   ::PostMessage(hb, WM_COMMAND, DlgID|BN_CLICKED<<16,(LPARAM)hb);*/
  }
 }
 //::ShowWindow(*pWnd,SW_SHOWMAXIMIZED);
 //::UpdateWindow(*pWnd);
 CView::OnLButtonDown(nFlags, point);
}