Re: An simple class derived from CDialog
On Mon, 11 Feb 2008 05:10:02 GMT, "David Ching" <dc@remove-this.dcsoft.com>
wrote:
"Doug Harrison [MVP]" <dsh@mvps.org> wrote in message
news:0rjvq3puagu3n7h4oh15hcoksdqccj93oj@4ax.com...
The background brush is an attribute of the WNDCLASS, so you'd have to use
RegisterClass to create a new "window class" and set the CREATESTRUCT's
lpszClass field to its name. Totally not worth the trouble.
But AfxRegisterWndClass() makes this trivial.
You can't use AfxRegisterWndClass for a dialog, because it uses the wrong
window proc and window extra bytes. You'd need to use AfxRegisterClass and
set up the entire WNDCLASS yourself.
Of greater concern is whether PreCreateWindow() is called for the type of
window in question. For example, I think dialogs are created prior to being
subclassed by the MFC object, in which case PreCreateWindow() won't be
called. PreSubclassWindow() will be, but that is too late to change the
window class.
Still more "trouble" to overcome.
I agree, overall just overriding OnEraseBkgnd() is simplest.
It certainly is. You don't have to know anything about window classes to
use it, it doesn't confound other software that identifies dialogs by the
class name "#32770", etc.
--
Doug Harrison
Visual C++ MVP
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