MFC打印對話框及控件功能

CXXXDlg::OnBtnprint() //響應答應按鈕
{
 CRect m_rect,framerect;
 //獲取對話框大小
 GetWindowRect(m_rect);
 //獲取圖片控件大小
 m_Frame.GetWindowRect(framerect);
 int x,y;
 x=framerect.left-m_rect.left;
 CDC* pImageDC=GetDC();
 int formx,formy;
 formx=pImageDC->GetDeviceCaps(LOGPIXELSX);
 formy=pImageDC->GetDeviceCaps(LOGPIXELSY);
 ReleaseDC(pImageDC);
 DWORD dwflags=PD_PAGENUMS|PD_HIDEPRINTTOFILE|PD_SELECTION;  //設置打印對話框風格
 CPrintDialog m_printdlg(FALSE,dwflags,NULL);     //創建打印對話框

 if(m_printdlg.DoModal()==IDOK)
 {
  CDC pdc;
  pdc.Attach(m_printdlg.GetPrinterDC());
  //獲取打印機與屏幕的分辨率
  int printerx,printery;
  printerx=pdc.GetDeviceCaps(LOGPIXELSX);
  printery=pdc.GetDeviceCaps(LOGPIXELSY);
  double ratex,ratey;
  ratex=(double)printerx/formx;
  ratey=(double)printery/formy;
  CClientDC dc(this);
  CBitmap bmp;
  bmp.CreateCompatibleBitmap(&dc,framerect.Width()+x,framerect.Height()+x);
  CDC imagedc;
  imagedc.CreateCompatibleDC(&dc);
  imagedc.SelectObject(&bmp);
  imagedc.BitBlt(0,0,framerect.Width()+x,framerect.Height()+x,&dc,0,0,SRCCOPY);
  BITMAP bmap;
  bmp.GetBitmap(&bmap);
  int panelsize=0;
  //非真彩色位圖
  if(bmap.bmBitsPixel<16)
  {
   panelsize=pow(2,bmap.bmBitsPixel*sizeof(RGBQUAD));
  }
  BITMAPINFO* bInfo=(BITMAPINFO*)LocalAlloc(LPTR,sizeof(BITMAPINFO)+panelsize);
  bInfo->bmiHeader.biClrImportant=0;
  bInfo->bmiHeader.biBitCount=bmap.bmBitsPixel;
  bInfo->bmiHeader.biCompression=0;
  bInfo->bmiHeader.biHeight=bmap.bmHeight;
  bInfo->bmiHeader.biPlanes=bmap.bmPlanes;
  bInfo->bmiHeader.biSize=sizeof(BITMAPINFO);
  bInfo->bmiHeader.biSizeImage=bmap.bmWidthBytes*bmap.bmHeight;
  bInfo->bmiHeader.biWidth=bmap.bmWidth;
  bInfo->bmiHeader.biXPelsPerMeter=0;
  bInfo->bmiHeader.biYPelsPerMeter=0;
  char *pData=new char[bmap.bmWidthBytes*bmap.bmHeight];
  ::GetDIBits(imagedc.m_hDC,bmp,0,bmap.bmHeight,pData,bInfo,DIB_RGB_COLORS);
  //打印圖像
  pdc.StartDoc("print");
  ::StretchDIBits(pdc.m_hDC,50,50,(int)((framerect.Width()*ratex)+x),
   (int)((framerect.Height()+x)*ratey),0,0,framerect.Width()+x,
   framerect.Height()+x,pData,bInfo,DIB_RGB_COLORS,SRCCOPY);
  pdc.EndDoc();
  LocalFree(bInfo);
  delete[] pData;
  bmp.DeleteObject();
 }

 
}