Capturing Entire ScreenShot Of PC in WIndows 8.1 - c++

Question

I'm making a C++ program which takes screenshot of the entire screen. I am facing quite a problem. When I run the program, it takes screenshot of the console screen only, not the entire desktop.
HDC Screen = CreateDC(L"DISPLAY", NULL, NULL, NULL);
HDC Capture = CreateCompatibleDC(Screen);
int width = GetDeviceCaps(Screen, HORZRES);
int height = GetDeviceCaps(Screen, VERTRES);
LPBYTE lpcapture;
BITMAPINFO bmiCapture =
{ { sizeof(BITMAPINFOHEADER),width,height,1,24,BI_RGB,0,0,0,0,0 } };
HBITMAP hbmCapture = CreateDIBSection(Screen, &bmiCapture, DIB_RGB_COLORS, (LPVOID *)&lpcapture, NULL, 0);
if (hbmCapture)
{
HBITMAP hbmOld = (HBITMAP) SelectObject(Capture, Capture);
BitBlt(Capture, 0, 0, width, height, Screen, 0, 0, SRCCOPY);
SelectObject(Capture, hbmOld);
}
DeleteDC(Capture);
DeleteDC(Screen);
return hbmCapture;

Answer 1

This should work in a console program, but it would show black console screen in the middle
int ScreenCapture(const char* fname)
{
int result = 0;
HWND hWnd = GetDesktopWindow();
HBITMAP hbmScreen = NULL;
HDC hdcScreen = GetDC(NULL);
HDC hdcWindow = GetDC(hWnd);
int w = GetSystemMetrics(SM_CXSCREEN);
int h = GetSystemMetrics(SM_CYSCREEN);
HDC hdcMemDC = CreateCompatibleDC(hdcWindow);
if (!hdcMemDC) goto cleanup;
hbmScreen = CreateCompatibleBitmap(hdcWindow, w, h);
if (!hbmScreen) goto cleanup;
SelectObject(hdcMemDC, hbmScreen);
if (!BitBlt(hdcMemDC, 0, 0, w, h, hdcWindow, 0, 0, SRCCOPY)) goto cleanup;
BITMAPFILEHEADER bmfHeader;
BITMAPINFOHEADER bi;
bi.biSize = sizeof(BITMAPINFOHEADER);
bi.biWidth = w;
bi.biHeight = h;
bi.biPlanes = 1;
bi.biBitCount = 32;
bi.biCompression = BI_RGB;
bi.biSizeImage = 0;
bi.biXPelsPerMeter = 0;
bi.biYPelsPerMeter = 0;
bi.biClrUsed = 0;
bi.biClrImportant = 0;
DWORD dwBmpSize = ((w * bi.biBitCount + 31) / 32) * 4 * h;
HANDLE hDIB = GlobalAlloc(GHND, dwBmpSize);
char* lpbitmap = (char*)GlobalLock(hDIB);
GetDIBits(hdcWindow, hbmScreen, 0, h, lpbitmap, (BITMAPINFO*)&bi, DIB_RGB_COLORS);
bmfHeader.bfOffBits = (DWORD)sizeof(BITMAPFILEHEADER) + (DWORD)sizeof(BITMAPINFOHEADER);
bmfHeader.bfSize = dwBmpSize + sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);
bmfHeader.bfType = 0x4D42; //'BM' for Bitmaps
DWORD temp = 0;
HANDLE hFile = CreateFileA(fname, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
WriteFile(hFile, (LPSTR)&bmfHeader, sizeof(BITMAPFILEHEADER), &temp, NULL);
WriteFile(hFile, (LPSTR)&bi, sizeof(BITMAPINFOHEADER), &temp, NULL);
WriteFile(hFile, (LPSTR)lpbitmap, dwBmpSize, &temp, NULL);
CloseHandle(hFile);
GlobalUnlock(hDIB);
GlobalFree(hDIB);
result = 1; //success
cleanup:
DeleteObject(hbmScreen);
DeleteObject(hdcMemDC);
ReleaseDC(NULL, hdcScreen);
ReleaseDC(hWnd, hdcWindow);
return result;
}