Path: utzoo!utgpu!cunews!cognos!chrisr
From: chrisr@cognos.UUCP (Christine Roine)
Newsgroups: comp.windows.ms.programmer
Subject: Re: Windows Subclassing
Message-ID: <9584@cognos.UUCP>
Date: 30 Apr 91 17:17:19 GMT
References: <1991Apr29.190909.12436@hyper.hyper.com> <1991Apr30.151433.12036@ccad.uiowa.edu>
Reply-To: chrisr@cognos.UUCP (Christine Roine)
Organization: Cognos Inc., Ottawa, Canada
Lines: 22


Tom Hite writes:
>
>You both realize, of course, Reference 1 of the Windows SDK says, explicitly,
>that you should NOT subclass Window's edit control windows.

I went on the Microsoft Windows Application Development course two weeks ago
and they said that this is a typo in the documentation.  What they meant
to say is that you should not SUPERCLASS Windows' edit controls.  It's
absolutely ok to subclass them in your application.

What is superclassing?  That's when you do a SetClassLong(hEditWnd,
GCL_WNDPROC, myOwnEditProc);  This causes all subsequently-created
edit windows to use myOwnEditProc as their window proc.  Since this applies
to ALL applications, not just the edits created by your application, this
is a potentially nasty thing to do.

-- 
Christine Roine          Cognos Incorporated     S-mail: P.O. Box 9707
Voice: (613) 738-1338 x6205                              3755 Riverside Drive
  FAX: (613) 738-0002                                    Ottawa, Ontario
 UUCP: mitel!cunews!cognos!chrisr                        CANADA  K1G 3Z4