最近維護的專案，在某些情況下，光有日誌還不行，於是添加了截圖功能，特定情況下，會自動截圖，輔助分析，從而改程序序。以下是截圖實現程式碼。

void CDemoDlg::ScreenShot(void)
{
    CWnd *pDesktop = GetDesktopWindow();
    CDC *pdeskdc = pDesktop->GetDC();
    CRect re;
    //獲取視窗的大小
    pDesktop->GetClientRect(&re);
    CBitmap bmp;
    bmp.CreateCompatibleBitmap(pdeskdc, re.Width(), re.Height());
    //建立一個相容的記憶體畫板
    CDC memorydc;
    memorydc.CreateCompatibleDC(pdeskdc);
    //選中畫筆
    CBitmap *pold = memorydc.SelectObject(&bmp);
    //繪製圖像
    memorydc.BitBlt(0, 0, re.Width(), re.Height(), pdeskdc, 0, 0, SRCCOPY);
    //獲取滑鼠位置，然後新增滑鼠影象
    CPoint po;
    GetCursorPos(&po);
    HICON hinco = (HICON)GetCursor();
    memorydc.DrawIcon(po.x - 10, po.y - 10, hinco);
    //選中原來的畫筆
    memorydc.SelectObject(pold);
    BITMAP bit;
    bmp.GetBitmap(&bit);
    //定義 影象大小（單位：byte）
    DWORD size = bit.bmWidthBytes * bit.bmHeight;
    LPSTR lpdata = (LPSTR)GlobalAlloc(GPTR, size);
    //後面是建立一個bmp檔案的必須檔案頭
    BITMAPINFOHEADER pbitinfo;
    pbitinfo.biBitCount = 24;
    pbitinfo.biClrImportant = 0;
    pbitinfo.biCompression = BI_RGB;
    pbitinfo.biHeight = bit.bmHeight;
    pbitinfo.biPlanes = 1;
    pbitinfo.biSize = sizeof(BITMAPINFOHEADER);
    pbitinfo.biSizeImage = size;
    pbitinfo.biWidth = bit.bmWidth;
    pbitinfo.biXPelsPerMeter = 0;
    pbitinfo.biYPelsPerMeter = 0;
    GetDIBits(pdeskdc->m_hDC, bmp, 0, pbitinfo.biHeight, lpdata, (BITMAPINFO*)
        &pbitinfo, DIB_RGB_COLORS);
    BITMAPFILEHEADER bfh;
    bfh.bfReserved1 = bfh.bfReserved2 = 0;
    bfh.bfType = ((WORD)('M' << 8) | 'B');
    bfh.bfSize = size + 54;
    bfh.bfOffBits = 54;
    //寫入檔案
    CFile file;
    CString strFileName(GetAppPathW().c_str());
    strFileName += _T("ScreenShot\\");
    CreateDirectory((LPCTSTR)strFileName, NULL);
    CTime t = CTime::GetCurrentTime();
    CString tt = t.Format("%Y-%m-%d_%H-%M-%S");
    strFileName += tt;
    strFileName += _T(".bmp");
    if (file.Open((LPCTSTR)strFileName, CFile::modeCreate | CFile::modeWrite))
    {
        file.Write(&bfh, sizeof(BITMAPFILEHEADER));
        file.Write(&pbitinfo, sizeof(BITMAPINFOHEADER));
        file.Write(lpdata, size);
        file.Close();
    }
    GlobalFree(lpdata);
}