Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

MFC Window Procedure

Posted on 1998-12-09
2
248 Views
Last Modified: 2013-11-20
With 32-bit version of MFC, Windows classes are no longer registered with the AfxWndProc() function - instead they are registered with DefWindowProc() as the message handler. However, AfxWndProc() is still there and it dispatches messages to various CWnd derived objects. My question is:
What is the main purpose behind using DefWindowProc() as the registered window procedure and yet how do messages end up in AfxWndProc()?
0
Comment
Question by:a_turtle
2 Comments
 
LVL 4

Accepted Solution

by:
pagladasu earned 150 total points
ID: 1325965
The primary reason as to why Microsoft shifted from using AfxWndProc() as the registered window procedure to using DefWindowProc() is to support 3D Controls, which works through Microsoft's CTL3D.DLL. In order to have CTL3D functionality,
MFC registers everything with DefWindowProc(), then during _AfxStandardSubclass(), hooks up CTL3D, and then finally adds a subclass on top of CTL3D by installing AfxWndProc().

Thanks.
pagladasu
0
 

Author Comment

by:a_turtle
ID: 1325966
Thanks. Could you please explain in more details about what really happens.
0

Featured Post

Networking for the Cloud Era

Join Microsoft and Riverbed for a discussion and demonstration of enhancements to SteelConnect:
-One-click orchestration and cloud connectivity in Azure environments
-Tight integration of SD-WAN and WAN optimization capabilities
-Scalability and resiliency equal to a data center

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Process filename extension 3 196
dog bark java program 15 109
withoutTen challenge 14 132
canBalance challenge 34 98
Introduction: Hints for the grid button.  Nested classes, templated collections.  Squash that darned bug! Continuing from the sixth article about sudoku.   Open the project in visual studio. First we will finish with the SUD_SETVALUE messa…
Exception Handling is in the core of any application that is able to dignify its name. In this article, I'll guide you through the process of writing a DRY (Don't Repeat Yourself) Exception Handling mechanism, using Aspect Oriented Programming.
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Established in 1997, Technology Architects has become one of the most reputable technology solutions companies in the country. TA have been providing businesses with cost effective state-of-the-art solutions and unparalleled service that is designed…

829 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question