Owner-Draw Round Button

From:

=?Utf-8?B?c2F3ZXI=?= <sawer@discussions.microsoft.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Sun, 19 Jul 2009 01:56:01 -0700

Message-ID:

<B340E550-2610-4EEE-B803-D09122119BAB@microsoft.com>

Hi

I'm tring to make owner draw round button.

1-)void CMyButton::PreSubclassWindow()
{
    CRect rc;
    GetClientRect( &rc );
    CRgn Region;
    Region.CreateRoundRectRgn(rc.left,rc.top,rc.right,rc.bottom,50,50);
    SetWindowRgn(Region,TRUE);

    CButton::PreSubclassWindow();
}
I searched and find out that SetWindowrgn function is used in
PreSubclassWindow handler. Is that a choice or rule for owner drawing?

2-) If i set owner-darw button to TRUE, i must write DrawItem method of my
custom class. I tried this:
void CMyButton::DrawItem(LPDRAWITEMSTRUCT dis)
{

    CDC * dc = CDC::FromHandle(dis->hDC);
    CRect r;
    GetClientRect(&r);

    int save = dc->SaveDC();

    COLORREF color;
    color = dis->itemState & ODS_SELECTED ? RGB(0,255,0) : RGB(255, 0, 0);
    CBrush br(color);
    dc->SelectObject(&br);

    dc->SelectClipPath(RGN_COPY);

    dc->PatBlt(0, 0, r.Width(), r.Height(), PATCOPY);

    dc->StrokePath();

    dc->RestoreDC(save);

}
But it didn't draw round button. What must be written to DrawItem function?

Thanks.