Showing size grip in CDialog?

Question

I have seen code which handles the drawing of this thing (DFCS_SCROLLSIZEGRIP), but surely there is a window style which I can apply to get it "for free". Right?

Answer 1

In lieu of a better answer, I will post the code I have that draws the size grip and handles the hit-testing. You also need to invalidate the appropriate area during OnSize in order to get it repainted.

BOOL CMyDialog::OnEraseBkgnd(CDC* pDC)
{
    if (CDialog::OnEraseBkgnd(pDC))
    {
     // draw size grip
     CRect r;
     GetClientRect(&r);
     int size = GetSystemMetrics(SM_CXVSCROLL);
     r.left = r.right - size;
     r.top = r.bottom - size;
     pDC->DrawFrameControl(&r, DFC_SCROLL, DFCS_SCROLLSIZEGRIP);
     return TRUE;
    }
    else
    {
     return FALSE;
    }
}

-

LRESULT CMyDialog::OnNcHitTest(CPoint point)
{
    // return HTBOTTOMRIGHT for sizegrip area
    CRect r;
    GetClientRect(&r);
    int size = GetSystemMetrics(SM_CXVSCROLL);
    r.left = r.right - size;
    r.top = r.bottom - size;
    ScreenToClient(&point);

    if (r.PtInRect(point))
    {
     return HTBOTTOMRIGHT;
    }
    else
     return CDialog::OnNcHitTest(point);
}

Source: http://www.tech-archive.net/Archive/Development/microsoft.public.win32.programmer.ui/2006-01/msg00103.html

Answer 2

I don't think there is a default style to get this functionality for free. You have to create a new child window with class name Scrollbar and control style SBS_SIZEGRIP