Capturing the Client Area Of a Window...

[Roopesh]

Hi,

I am working on VC++ 5.0.

I want to capture the client area of my application window on to a memory device context. But if there are any other Modeless dialog boxes on the client area of my window, even they get captured.

Is there any way that i can solve this problem..?

Awaiting for ur kind response...

Thank u

[lin]

i think you can bring your window to foreground and get CDC

of current window

[Roopesh]

Thanks a Lot for responding...

Do u have the code for doing the same?

If 'S' please do type in.

Thanks

Waiting.......

[Jerry Coffin]

If you're working in MFC and want to capture a particular view, rather than the entire app's client area, you can

simply invoke OnDraw to do the job:

void CMyView::CaptureClient() {

CBitmap bm;

CRect rect;

CClientDC dc(this);

CDC mem_dc;

GetClientRect(&rect);

bm.CreateCompatibleBitmap(dc, rect.Width(), rect.Height());

mem_dc.CreateCompatibleDC(dc);

mem_dc.SelectObject(bm);

OnDraw(mem_dc);

// bm now contains an image of the client area of your view.

// Do with it as you please...

}

If you need to capture the client area of the entire application, you can _try_ sending it a WM_PAINT message with your

DC's handle in wParam. Putting a DC handle into wParam has been a documented part of WM_PAINT for a few years now, but

MOST applications still ignore it, and always draw to the screen instead. You may have to update the application

you're trying to capture to handle WM_PAINT correctly before this will work. IIRC, if you're using MFC, it does use an

HDC in wParam, but I'd have to check to be sure.