활성화된 화면 캡쳐 ScreenCapture

HBITMAP ScreenCapture(HWND hWnd)

{

HDC hScrDC, hMemDC;

HBITMAP hBitmap;

RECT rt;

GetWindowRect(GetForegroundWindow(), &rt);

// GetWindowRect(GetActiveWindow(), &rt);

rt.left = max(0, rt.left);

rt.right = min(rt.right, GetSystemMetrics(SM_CXSCREEN));

rt.top = max(0, rt.top);

rt.bottom = min(rt.bottom, GetSystemMetrics(SM_CYSCREEN));

hScrDC=CreateDC("DISPLAY",NULL,NULL,NULL);

hMemDC = CreateCompatibleDC(hScrDC);

hBitmap = CreateCompatibleBitmap(hScrDC, rt.right-rt.left, rt.bottom-rt.top);

SelectObject(hMemDC, hBitmap);

BitBlt(hMemDC, 0, 0, rt.right-rt.left, rt.bottom-rt.top, hScrDC, rt.left, rt.top, SRCCOPY);

DeleteDC(hMemDC);

DeleteDC(hScrDC);

InvalidateRect(hWnd, NULL, TRUE);

return hBitmap;

}

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위의 함수를 호출하여 사용한다

핫키를 등록하여 Ctrl + F4가 눌리면 화면 캡쳐!

WM_PAINT에서 캡쳐된 화면을 그려줌 

case WM_CREATE:

RegisterHotKey(hWnd, 0, MOD_CONTROL, VK_F4);

break;

case WM_HOTKEY:

hBit = ScreenCapture(hWnd); // CTRL +F4

return 0;

case WM_PAINT:

hdc = BeginPaint(hWnd, &ps);

if(hBit != NULL) 

{

hMemDC = CreateCompatibleDC(hdc);

SelectObject(hMemDC, hBit);

GetObject(hBit, sizeof(BITMAP), &bmp);

BitBlt(hdc, 0, 0, bmp.bmWidth, bmp.bmHeight, hMemDC, 0, 0, SRCCOPY);

DeleteDC(hMemDC);

}

EndPaint(hWnd, &ps);

return 0;

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