I have a question about inheritance and the flow of logic.  There is 
a class, CCommUI, which is decended from CDialog.  CComUI contains a
method, OnCancel, which is included in the appropriate message map to
be called whenever the "Cancel" button in the modal dialog box (the
CComUI object) is pressed.
A snippet of code goes something like this:
void CComUI::OnCancel()
{
    CWnd * pbutton = GetDlgItem(IDCANCEL);
    pbutton->EnableWindow(FALSE);
           .
           .
           .
    CDialog::OnCancel();
}
The question I have is this:
Does the line containing the call to the parent "percolate" up to the
child?  What is the purpose of this call in the first place if
CDialog::OnCancel() had never been specifically fleshed out (or even
mentioned) anywhere in the code?
As an aside, I commented this line out and the software ran as
expected.  With that line left in the code there was always a premature
closing of the dialog box.  Does this mean that the method,
CDialog::OnCancel(), was performing some action on its own without me
even being aware of it?
 * KWQ/2 1.2i * 
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