here my custom dialog
class CMyDialog: public CAknDialog{
void  Draw(const TRect &aRect) const;
};
void CMyDialog::Draw(const TRect &aRect) const
{
   CWindowGc& gc=SystemGc();
   gc.DrawLine(TPoint(0,0),TPoint(20,20));
   gc.UseFont(iEikonEnv->TitleFont());
   gc.DrawText(_L("abc"),TPoint(10,10));
}
after Draw() is runned,line and text still not appear on dialog
can anyone help me?