一段贴背景及写文字的代码

BOOL CBaseBmpWnd :: OnEraseBkgnd (CDC *pDC)
{
 // If no bitmap is loaded, behave like a normal dialog box
 if (!m_bBitmapExists)
  return CWnd :: OnEraseBkgnd (pDC);
 if(NULL==m_bmBitmap)
  return CWnd :: OnEraseBkgnd (pDC);
 CDC picDC; 
    picDC.CreateCompatibleDC (pDC);
    CBitmap *pOldBmp;
    pOldBmp = picDC.SelectObject (m_bmBitmap);
 //picDC.SelectObject(pOldBmp);
    BITMAP bm;
    m_bmBitmap->GetBitmap(&bm);
 CRect rcClient;
 GetClientRect(&rcClient);
 int width = min (bm.bmWidth, rcClient.Width());
 int height = min (bm.bmHeight, rcClient.Height());
 pDC->BitBlt (0,0,width,height,&picDC,0,0,SRCCOPY);
 //if(m_strCaption!=_T(""))//输出字体
 //{
  int nOldMode=pDC->SetBkMode(TRANSPARENT);  
  if(m_uWndStatus == 1)
  {
   m_clrText=GetSysColor(COLOR_HIGHLIGHT);
  }
  else if (m_uWndStatus==0)
  {
   m_clrText=RGB(148,148,148);
  }
  COLORREF clrOldText = pDC->SetTextColor(m_clrText); 
  CFont* pOldFont = pDC->SelectObject(&m_ft);
  CSize szCaption = pDC->GetTextExtent(m_strCaption);
  int nx ,ny;
  nx = (rcClient.Width()  - szCaption.cx ) /2;
  ny =(rcClient.Height() - szCaption.cy - m_uBottomEage) /2;
  //picDC.BitBlt(nx,ny,szCaption.cx,szCaption.cy,pDC,nx,ny,SRCCOPY); 
  pDC->TextOutW(nx,ny,m_strCaption);  
 //} 
    pDC->SelectObject(pOldBmp);
 pDC->SetTextColor(clrOldText);
 pDC->SelectObject(pOldFont);
 pDC->SetBkMode(nOldMode);
 picDC.DeleteDC();
 return TRUE;
}