Re: Make client area of frame view a certain (fixed) size (AdjustWindowRectEx problem)

WP <invalid@invalid.invalid>
Wed, 30 Jul 2008 23:20:05 +0200
Mark Salsbery [MVP] wrote:
[snip older posts]

You need to initialize the rect before passing it to ::AdjustWindowRectEx()

rect.left = 0; = 0;
rect.right = 400;
rect.bottom = 400;

   BOOL b = ::AdjustWindowRectEx(&rect, WS_CAPTION | WS_BORDER |
WS_MINIMIZEBOX | WS_SYSMENU, 0, TRUE); = 400; = 400;

Then use the adjusted rect values: = rect.right - rect.left; = rect.bottom -;


Doh! You're right, I forgot that completely. The raw Win32 code did that
but I totally forgot it here. Anyway, I'm not completely there yet
because the client area of the frame view is only 396 * 396. First it
was 392*392 but I removed the extended style WS_EX_CLIENTEDGE that was
set in the view's PreCreateWindow. So it seems the view's non-client
area still takes up some space (4 pixels on each side to exact). How do
I account for that or remove it? I need this code to be portable, so I
can't just adjust it for my system. Here are both PreCreateWindow():s now:

BOOL DoubleBufferingMainFrame::PreCreateWindow(CREATESTRUCT& cs)

    CRect rect(0, 0, 400, 400);

    BOOL b = ::AdjustWindowRectEx(&rect,, cs.dwExStyle, TRUE); = abs(rect.left) + abs(rect.right); = abs( + abs(rect.bottom);

    cs.lpszClass = AfxRegisterWndClass(0);

    return TRUE;

BOOL DoubleBufferingChildView::PreCreateWindow(CREATESTRUCT& cs)

    //cs.dwExStyle |= WS_EX_CLIENTEDGE; &= ~WS_BORDER;
    cs.lpszClass = AfxRegisterWndClass(CS_HREDRAW|CS_VREDRAW|CS_DBLCLKS,
    ::LoadCursor(NULL, IDC_ARROW),
reinterpret_cast<HBRUSH>(COLOR_WINDOW+1), NULL);

    return TRUE;

Thanks for the quick replies btw, this newsgroup is really great! Fast,
quality replies - can't ask for more!

- Eric (WP)

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