vc++如何将客户区存为bmp【zz】

在view类中添加以下三个函数：

BOOL CTestestView::WriteWindowToDIB(LPTSTR szFile, CWnd *pWnd)

{

       CBitmap bitmap;

       CWindowDC dc(pWnd);

       CDC memDC;

       CRect rect;

       memDC.CreateCompatibleDC(&dc);

       pWnd->GetWindowRect(rect);

       bitmap.CreateCompatibleBitmap(&dc,rect.Width(),rect.Height());

       CBitmap* pOldBitmap=memDC.SelectObject(&bitmap);

       memDC.BitBlt(0,0,rect.Width(),rect.Height(),&dc,0,0,SRCCOPY);

       CPalette pal;

       if(dc.GetDeviceCaps(RASTERCAPS)&RC_PALETTE)

       {

              UINT nSize=sizeof(LOGPALETTE)+(sizeof(PALETTEENTRY)*256);

              LOGPALETTE* pLP=(LOGPALETTE*)new BYTE[nSize];

              pLP->palVersion=0x300;

              pLP->palNumEntries=GetSystemPaletteEntries(dc,0,255,pLP->palPalEntry);

              pal.CreatePalette(pLP);

              delete[] pLP;

 

       }

       memDC.SelectObject(pOldBitmap);

       HANDLE hDIB=DDBToDIB(bitmap,BI_RGB,&pal);

       if(hDIB==NULL)

              return FALSE;

       WriteDIB(szFile,hDIB);

       GlobalFree(hDIB);

       return TRUE;

 

}

 

HANDLE CTestestView::DDBToDIB(CBitmap &bitmap, DWORD dwCompression, CPalette *pPal)

{

       BITMAP bm;

       BITMAPINFOHEADER bi;

       LPBITMAPINFOHEADER lpbi;

       DWORD dwLen;

       HANDLE hDIB;

       HANDLE handle;

       HDC hDC;

       HPALETTE hPal;

       ASSERT(bitmap.GetSafeHandle());

       if(dwCompression==BI_BITFIELDS)

              return NULL;

       hPal=(HPALETTE)pPal->GetSafeHandle();

       if(hPal==NULL)

              hPal=(HPALETTE)GetStockObject(DEFAULT_PALETTE);

       bitmap.GetObject(sizeof(bm),(LPSTR)&bm);

       bi.biSize=sizeof(BITMAPINFOHEADER);

       bi.biWidth=bm.bmWidth;

       bi.biHeight=bm.bmHeight;

       bi.biPlanes=1;

       bi.biBitCount=bm.bmPlanes*bm.bmBitsPixel;

       bi.biCompression=dwCompression;

       bi.biSizeImage=0;

       bi.biXPelsPerMeter=0;

       bi.biYPelsPerMeter=0;

       bi.biClrImportant=0;

       bi.biClrUsed=0;

 

       int nColors=(1<<bi.biBitCount);

       if(nColors>256)

              nColors=0;

       dwLen=bi.biSize+nColors*sizeof(RGBQUAD);

       hDC=::GetDC(NULL);

       hPal=SelectPalette(hDC,hPal,FALSE);

       RealizePalette(hDC);

       hDIB=GlobalAlloc(GMEM_FIXED,dwLen);

       if(!hDIB)

       {

              SelectPalette(hDC,hPal,FALSE);

                     ::ReleaseDC(NULL,hDC);

              return NULL;

 

       }

      

       lpbi=(LPBITMAPINFOHEADER)hDIB;

       *lpbi=bi;

       GetDIBits(hDC,(HBITMAP)bitmap.GetSafeHandle(),0L,(DWORD)bi.biHeight,(LPBYTE)NULL,(LPBITMAPINFO)lpbi,(DWORD)DIB_RGB_COLORS);

       bi=*lpbi;

       if(bi.biSizeImage==0)

       {

              bi.biSizeImage=((((bi.biWidth*bi.biBitCount)+31)& ~31)/8)*bi.biHeight;

              if(dwCompression!=BI_RGB)

                     bi.biSizeImage=(bi.biSizeImage*3)/2;

       }

 

       dwLen+=bi.biSizeImage;

       if(handle=GlobalReAlloc(hDIB,dwLen,GMEM_MOVEABLE))

              hDIB=handle;

       else

       {

              GlobalFree(hDIB);

              SelectPalette(hDC,hPal,FALSE);

              ::ReleaseDC(NULL,hDC);

              return NULL;

       }

       lpbi=(LPBITMAPINFOHEADER)hDIB;

       BOOL bGotBits=GetDIBits(hDC,(HBITMAP)bitmap.GetSafeHandle(),0L,(DWORD)bi.biHeight,(LPBYTE)lpbi+(bi.biSize+nColors*sizeof(RGBQUAD)),

              (LPBITMAPINFO)lpbi,(DWORD)DIB_RGB_COLORS);

       if(!bGotBits)

       {

              GlobalFree(hDIB);

              SelectPalette(hDC,hPal,FALSE);

              ::ReleaseDC(NULL,hDC);

              return NULL;

       }

       SelectPalette(hDC,hPal,FALSE);

       ::ReleaseDC(NULL,hDC);

       return hDIB;

}

 

BOOL CTestestView::WriteDIB(LPTSTR szFile, HANDLE hDIB)

{

       BITMAPFILEHEADER hdr;

       LPBITMAPINFOHEADER lpbi;

       if(!hDIB)

              return FALSE;

       CFile file;

       if(!file.Open(szFile,CFile::modeWrite|CFile::modeCreate))

              return FALSE;

       lpbi=(LPBITMAPINFOHEADER)hDIB;

       int nColors=1<<lpbi->biBitCount;

       hdr.bfType=((WORD)('M'<<8)|'B');

       hdr.bfSize=::GlobalSize(hDIB)+sizeof(hdr);

       hdr.bfReserved1=0;

       hdr.bfReserved2=0;

       hdr.bfOffBits=(DWORD)(sizeof(hdr)+lpbi->biSize+nColors*sizeof(RGBQUAD));

       file.Write(&hdr,sizeof(hdr));

       file.Write(lpbi,GlobalSize(hDIB));

       return TRUE;

 

}

 在保存时调用函数WriteWindowToDIB（）

void CTestestView::OnFileSave()

{

       // TODO: Add your command handler code here

       WriteWindowToDIB("D:\\My.bmp",this);    

}

 

本人测试过,确实直接加上就可以了,但是注意类名要改为和你的一致的