句柄的基本操作，qq登录例子

void __fastcall TForm1::tmr1Timer(TObject *Sender)
{
  HWND a,b;
  a=FindWindow("TXGuiFoundation","QQ2009");
  b=FindWindowEx(a,0,"ATL:30A410F8",NULL);
  if(!b==NULL)
  {
  SendMessage(b,WM_SETFOCUS,0,0);
  ShowWindow(a,9);
  keybd_event('5',0,0,0);
  keybd_event('5',0,KEYEVENTF_KEYUP,0);
  keybd_event('2',0,0,0);
  keybd_event('2',0,KEYEVENTF_KEYUP,0);
  keybd_event('3',0,0,0);
  keybd_event('3',0,KEYEVENTF_KEYUP,0);
     Sleep(100);
  keybd_event(VK_RETURN,0,0,0);
  keybd_event(VK_RETURN,0,KEYEVENTF_KEYUP,0);
  tmr1->Enabled=false;
  Application->Terminate();
 }
}
//---------------------------------------------------------------------------
void __fastcall TForm1::FormCreate(TObject *Sender)
{
aa=0;
Form1->Visible=false;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::tmr2Timer(TObject *Sender)
{
  ShellExecuteA(NULL,"open","E:\\软件\\QQ.exe",NULL,NULL,SW_SHOWNORMAL  );
  tmr1->Enabled=true;
  tmr2->Enabled=false;
}
//---------------------------------------------------------------------------
void __fastcall TForm1::FormShow(TObject *Sender)
{
 Form1->Width=0;
 Form1->Height=0;   
}