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hello all,
i made an app to save part of my screen to a jpeg... it works great on single monitor... but if i pass a rect thats not within the main monitor the image will be black... anyone know they easy way to get part of the screen on any monitor... thx...
So how do you get the second monitor screen ?
this the code i use to take snap shot of my screen and crop it to the rect i want.. then save as jpeg...
works fine on single monitor... how can i change this to work on dual monitors...
Code:
HDC WinDC;
HDC CopyDC;
HBITMAP hBitmap;
ULONG bWidth,bHeight;
WinDC = ::GetDC(NULL);
CopyDC = CreateCompatibleDC(WinDC);
bWidth = GetDeviceCaps(WinDC, HORZRES);
bHeight = GetDeviceCaps(WinDC, VERTRES);
hBitmap = CreateCompatibleBitmap(WinDC,bWidth,bHeight);
SelectObject(CopyDC,hBitmap);
BitBlt(CopyDC,0,0,bWidth,bHeight,WinDC,0,0,SRCCOPY);
::ReleaseDC(NULL,WinDC);
DeleteDC(CopyDC);
HDC hSrc = CreateCompatibleDC(NULL);
SelectObject(hSrc,hBitmap);
HDC hNew = CreateCompatibleDC(hSrc);
HBITMAP hBmp = CreateCompatibleBitmap(hSrc,width,height);
HBITMAP hOld = (HBITMAP)SelectObject(hNew,hBmp);
BitBlt(hNew,0,0,width,height,hSrc,left,top, SRCCOPY);
SelectObject(hNew,hOld);
//code to save jpeg here....
DeleteDC(hSrc);
DeleteDC(hNew);
DeleteObject(hOld);
DeleteObject(hBmp);
DeleteObject(hBitmap);
i still need help with this...
trying find way to get bitmap of the second monitor...
and make it work in the code above...
thx...