How to save (DC member) to bitmapfile? Please Help!

Hi again!

I want to save memBitmap to a bitmap File. what should I do

this my code:

CPaintDC dc(this) ;
CDC memDC ;
CBitmap memBitmap ;
CBitmap* oldBitmap ;

memDC.CreateCompatibleDC(&dc) ;
memBitmap.CreateCompatibleBitmap(&dc,(2+myRect.Width()),(2+3*myRect.Height())) ;
oldBitmap = (CBitmap *)memDC.SelectObject(&memBitmap) ;

if (memDC.GetSafeHdc() != NULL)
{
memDC.BitBlt(1,1,(2+myRect.Width()),(2+3*myRect.Height())
,&dc,(3+myRect.left) ,(3+myRect.top) ,SRCCOPY );
}
memDC.SelectObject(oldBitmap) ;

thank for Answer.