VC++ 下截取屏幕相关操作:

当我们的应用程序运行在一些设备上的时候,我们有的时候需要一些截屏操作,
  用来保存获取软件运行中出现的问题,这个时候截屏显得很重要.

 具体实现为：
 void CScreenshot::SaveScreen()
{
 SYSTEMTIME time;
 GetSystemTime(&time);
 int mm = time.wMonth;
 int dd = time.wDay;
 int h  = time.wHour;
 int m  = time.wMinute;
 int s  = time.wSecond;
 
 TCHAR szPath[MAX_PATH];
 _stprintf(szPath, _T("%s\\bmp\\"), g_szDataPath);
 CreateDirectory(szPath, NULL);
 // 创建保存文件的路径和名称
 char filename[300];
 TCHAR file[100];
 wsprintf(file, _T("%s%02d%02d%02d%02d%02d.bmp"), szPath,mm,dd,h,m,s);
 sprintf(filename, "%S", file);
 OnScreenSave(filename);
 MessageBox(g_hwnd, _T("截屏失败!"), _T("提示"), MB_OK);
}

void CScreenshot::OnScreenSave(const char *filename)
{
 HDC  hScrDC, hMemDC;
 int  width, height;
 
 BYTE  *lpBitmam_pBitsMap = NULL;
 
 hScrDC = CreateDC(_T("DISPLAY"), NULL, NULL, NULL);
 
 width = GetDeviceCaps(hScrDC, HORZRES);
 height = GetDeviceCaps(hScrDC, VERTRES);
 hMemDC = CreateCompatibleDC(hScrDC);
 BITMAPINFO RGB24BitsBITMAPINFO;
 ZeroMemory(&RGB24BitsBITMAPINFO, sizeof(BITMAPINFO));
 RGB24BitsBITMAPINFO.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
 RGB24BitsBITMAPINFO.bmiHeader.biWidth = width;
 RGB24BitsBITMAPINFO.bmiHeader.biHeight = height;
 RGB24BitsBITMAPINFO.bmiHeader.biPlanes = 1;
 RGB24BitsBITMAPINFO.bmiHeader.biBitCount = 24;
 HBITMAP directBmp = CreateDIBSection(hMemDC, (BITMAPINFO*)&RGB24BitsBITMAPINFO, DIB_RGB_COLORS, (void **)&lpBitmam_pBitsMap, NULL, 0);
 HGDIOBJ previousObject = SelectObject(hMemDC, directBmp);
 BitBlt(hMemDC, 0, 0, width, height, hScrDC, 0, 0, SRCCOPY);
 
 BITMAPFILEHEADER bmBITMAPFILEHEADER;
 ZeroMemory(&bmBITMAPFILEHEADER, sizeof(BITMAPFILEHEADER));
 bmBITMAPFILEHEADER.bfType = 0x4d42;
 bmBITMAPFILEHEADER.bfOffBits = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
 bmBITMAPFILEHEADER.bfSize = bmBITMAPFILEHEADER.bfOffBits + ((width*height)*3);
 FILE *mStream = NULL;
 if((mStream = fopen(filename, "wb")))
 { 
  //写位图文件头
  fwrite(&bmBITMAPFILEHEADER, sizeof(BITMAPFILEHEADER), 1, mStream);
  fwrite(&(RGB24BitsBITMAPINFO.bmiHeader), sizeof(BITMAPINFOHEADER), 1, mStream);
  fwrite(lpBitmam_pBitsMap, 3*width*height, 1, mStream);
  fclose(mStream);
 }
 SelectObject(hMemDC, previousObject);
 DeleteObject(directBmp);
 DeleteDC(hMemDC);
 DeleteDC(hScrDC);
 
}
 
以上仅供参看！