Capture all the GUI windows' Image that Running on the Desktop

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Here I captured all the GUI images that running on the desktop, including the GUI that running on the virtual desktop that is created via "task view" under WIN 10.

Please note that the GUI that is in minimize status cannot be captured in this method. Also, the Internet Explorer cannot be captured with this method.

#include <gdiplus.h>using namespace Gdiplus;GdiplusStartupInput gdiplusStartupInput;ULONG_PTR gdiplusToken;BOOL CvirtualDesktopDlg::OnInitDialog(){CDialogEx::OnInitDialog();// Set the icon for this dialog. The framework does this automatically// when the application‘s main window is not a dialogSetIcon(m_hIcon, TRUE);    // Set big iconSetIcon(m_hIcon, FALSE);    // Set small icon// TODO: Add extra initialization hereGdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);std::ofstream mylog("mylog.log");CWnd* pDesktopWnd = CWnd::GetDesktopWindow();CWnd* pWnd = pDesktopWnd->GetWindow(GW_CHILD);int jpgnum = 0;while (pWnd != NULL){mylog << "number:" << jpgnum << endl;CString strClassName = _T(" ");::GetClassName(pWnd->GetSafeHwnd(), strClassName.GetBuffer(256), 256);mylog << "class name\t:" << (CT2A)(LPCTSTR) strClassName << endl;CString strWindowText = _T(" ");::GetWindowText(pWnd->GetSafeHwnd(), strWindowText.GetBuffer(256), 256);mylog << "window text\t:" << (CT2A)(LPCTSTR)strWindowText << endl;char jpgfilename[1024];sprintf_s(jpgfilename, "jpg_%d.jpg", jpgnum++);//jpgfilename.Format(_T("jpg_%d"), jpgnum++);USES_CONVERSION;saveDesktoptoJPG(A2T(jpgfilename), pWnd->m_hWnd);pWnd = pWnd->GetWindow(GW_HWNDNEXT);}mylog.close();return TRUE; // return TRUE unless you set the focus to a control}void CvirtualDesktopDlg::saveDesktoptoJPG(TCHAR *jpgFilePathName, HWND hwnd){//Get desktop DC/*HWND hDeskWnd = ::GetDesktopWindow();CDC *pDestDC = CDC::FromHandle(::GetDC(hDeskWnd));*/CDC *pDestDC = CDC::FromHandle(::GetDC(hwnd) );int screenWidth = pDestDC->GetDeviceCaps(HORZRES);int screenHeight = pDestDC->GetDeviceCaps(VERTRES);//Create Bitmap that is comatible with desktopCBitmap memBitmap;memBitmap.CreateCompatibleBitmap(pDestDC, screenWidth, screenHeight);//create memory DC for desktopCDC memDC;memDC.CreateCompatibleDC(pDestDC);memDC.SelectObject(&memBitmap);//copy desktop DC to the memery DCmemDC.BitBlt(0, 0, screenWidth, screenHeight, pDestDC, 0, 0, SRCCOPY);//obtain the bitmap informationBITMAP bmpInfo;memBitmap.GetBitmap(&bmpInfo);//generate BITMAPINFOBITMAPINFO m_BITMAPINFO;memset(&m_BITMAPINFO, 0, sizeof(BITMAPINFO));m_BITMAPINFO.bmiHeader.biSize = sizeof(BITMAPINFO);m_BITMAPINFO.bmiHeader.biPlanes = 1;m_BITMAPINFO.bmiHeader.biBitCount = bmpInfo.bmBitsPixel;m_BITMAPINFO.bmiHeader.biCompression = BI_RGB;m_BITMAPINFO.bmiHeader.biWidth = bmpInfo.bmWidth;m_BITMAPINFO.bmiHeader.biHeight = bmpInfo.bmHeight;//get the data of bitmapBYTE* pBuffer = new BYTE[bmpInfo.bmWidthBytes*bmpInfo.bmHeight];GetDIBits(memDC.m_hDC, (HBITMAP)memBitmap.m_hObject, 0, screenHeight, pBuffer, (LPBITMAPINFO)&m_BITMAPINFO, DIB_RGB_COLORS);//generate bitmapBitmap *pSrcBmp = Bitmap::FromBITMAPINFO(&m_BITMAPINFO, (void*)pBuffer);//save to jpgCLSID encoderClsid;GetEncoderClsid(L"image/jpeg", &encoderClsid);// pSrcBmp->Save(L"D:\\desktop.jpg", &encoderClsid);pSrcBmp->Save(jpgFilePathName, &encoderClsid);delete pSrcBmp;delete pBuffer;ReleaseDC(pDestDC);}int CvirtualDesktopDlg::GetEncoderClsid(const WCHAR* format, CLSID* pClsid){/*The preceding code produces the following output:image/bmpimage/jpegimage/gifimage/x-emfimage/x-wmfimage/tiffimage/pngimage/x-icon*/UINT num = 0; // number of image decodersUINT size = 0; // size, in bytes, of the image decoder arrayImageCodecInfo* pImageCodecInfo = NULL;// How many decoders are there?// How big (in bytes) is the array of all ImageCodecInfo objects?GetImageEncodersSize(&num, &size);if (size == 0){return -1;}// Create a buffer large enough to hold the array of ImageCodecInfo// objects that will be returned by GetImageDecoders.pImageCodecInfo = (ImageCodecInfo*)(malloc(size));if (pImageCodecInfo == NULL){return -1;}// GetImageDecoders creates an array of ImageCodecInfo objects// and copies that array into a previously allocated buffer.// The third argument, imageCodecInfos, is a pointer to that buffer.GetImageEncoders(num, size, pImageCodecInfo);for (UINT j = 0; j< num; ++j){if (wcscmp(pImageCodecInfo[j].MimeType, format) == 0){*pClsid = pImageCodecInfo[j].Clsid;free(pImageCodecInfo);return j; //success}}free(pImageCodecInfo);return -1; //failure}

Rusult:

file: <mylog.log>

number:0
class name:MSCTFIME UI
window text:MSCTFIME UI
number:1
class name:IME
window text:Default IME
number:2
class name:MSCTFIME UI
window text:MSCTFIME UI
number:3
class name:IME
window text:Default IME
number:4
class name:ForegroundStaging
window text:
number:5
class name:ForegroundStaging
window text:
number:6
class name:TaskListThumbnailWnd
window text:
number:7
class name:tooltips_class32
window text:
number:8
class name:tooltips_class32
window text:

 

Capture all the GUI windows' Image that Running on the Desktop