C++/(Windows)캡처 윈도우

BOOL CaptureWnd(int pid, CString filename)
{
	HWND hHwnd = NULL;
	if (pid == 0)
		hHwnd = GetDesktopWindow();
	else
	{
		// explorer.exe 인 경우 전체화면
		HANDLE hProcess = OpenProcess(PROCESS_VM_OPERATION | PROCESS_QUERY_INFORMATION | PROCESS_VM_READ, FALSE, pid);
		WCHAR buf[MAX_PATH] = {0,};
		if (GetProcessImageFileName(hProcess, buf, MAX_PATH))
		{
			CString strFinder(buf);
			strFinder.MakeUpper();
			if (strFinder.Find(_T("EXPLORER.EXE")) > 0)
			{
				hHwnd = GetDesktopWindow();
			}
		}
		else
		{
			WCHAR buf[MAX_PATH] = {0,};
			GetProcessName(pid, buf, MAX_PATH);
			AfxMessageBox(buf);

RECT rect = {0,};
			HWND hBackWnd = GetDesktopWindow();
			GetHWNDFromPID(pid, NULL, &hBackWnd, rect);
			hHwnd = hBackWnd;
		}
	}

if (hHwnd == NULL)
		hHwnd = GetDesktopWindow();

CWnd* pWnd = CWnd::FromHandle(hHwnd);
	CClientDC dc(pWnd);

CRect rect;
	::GetClientRect(hHwnd, rect);

CDC dcMem;
	dcMem.CreateCompatibleDC(&dc);

CBitmap bitmap;
	bitmap.CreateCompatibleBitmap(&dc, rect.Width(), rect.Height());
	CBitmap* bitmapOld = dcMem.SelectObject(&bitmap);

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

// Watermarking
	CFont font;
	font.CreateFont(12, 0, 0, 0, FW_BOLD, FALSE, FALSE, 0, DEFAULT_CHARSET,
		OUT_DEFAULT_PRECIS, CLIP_DEFAULT_PRECIS, DEFAULT_QUALITY,
		DEFAULT_PITCH | FF_SWISS, _T("굴림체"));
	CFont* fontOld = dcMem.SelectObject(&font);
	dcMem.SetBkMode(TRANSPARENT);

CString str = filename;
	dcMem.SetTextColor(RGB(33, 255, 33));
	dcMem.TextOut(20, rect.Height() - 70, str.GetBuffer(0), str.GetLength());
	TCHAR buf[MAX_PATH] = {0,};
	if (CUtilGlobal::GetProcessPathByPID(pid, buf))
		str.Format(_T("%s (Pid=%d)"), buf, pid);
	else
		str.Format(_T("Get Process Path Failed (Pid=%d)"), pid);
	dcMem.TextOut(20, rect.Height() - 55, str.GetBuffer(0), str.GetLength());
	//str.Format(_T("(Dll:C:\\Program Files (x86)\\DreamSecurity\\NTSMagicLineMBX\\PKICertCls.dll)"));
	//dcMem.TextOut(20, rect.Height() - 40, str.GetBuffer(0), str.GetLength());

// Save
	CImage captureImage;
	if(!captureImage.Create(rect.Width(), rect.Height(), 32))
		return FALSE;
	HDC hDC = captureImage.GetDC();
	BitBlt(hDC, 0, 0, rect.Width(), rect.Height(), dcMem.GetSafeHdc(), 0, 0, SRCCOPY);
	captureImage.Save(filename, Gdiplus::ImageFormatJPEG);
	captureImage.ReleaseDC();

dcMem.SelectObject(&bitmapOld);
	dcMem.SelectObject(&fontOld);
	dcMem.DeleteDC();

return TRUE;
}

//CaptureWnd(process id, file path);
CaptureWnd(0, _T("C:\\capture.jpg")); //전체화면