CClientDC dc(this);

HBITMAP tbmp;
tbmp=LoadBitmap(AfxGetInstanceHandle(),"t.bmp");
HDC tdc;

tdc=CreateCompatibleDC(dc.m_hDC);
SelectObject(tdc,tbmp);
BitBlt(dc.m_hDC,0,0,20,20,tdc,0,0,SRCCOPY);