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Win32 Question

General and Gameplay Programming Programming

Started by Aztec March 14, 2000 09:15 PM

5 comments, last by Aztec 24 years, 1 month ago

Aztec

122

Author

March 14, 2000 09:15 PM

okay, i''ve started to learn the basics of win32 stuff... how and when does WindProc get called? in WinMain, it''s never directly called, and in the doInit function it doesn''t call it, yet the code gets executed. I''m rather confused by this :/ thanks for the help

Mike

141

March 14, 2000 09:33 PM

I''m not to good at explaining things but here is generally what happens:

When you created the window class you specified a window procedure function. You then registered your class (RegisterClass). Next you most likely created a window. In the CreateWindow funciton one of the parameters is a window class. You obviously specified the class you just registerd.

Whenever the OS needs an application to handle a message it looks to see what class the window is and then uses that class''s procedure function.

Useless Code

Ampere

122

March 14, 2000 09:36 PM

It sounds as though you''re asking about a particular piece of code, but it should work the same for any win32 program. You register the function in the window class (WNDCLASSEX.lpfnWndProc). Then the function is called by the os when a message is sent to the window.

SiCrane

11,840

March 14, 2000 09:41 PM

Essentially WndProc is called when DispatchMessage is. (not quite, but close enough for every day use)

Anonymous

March 14, 2000 10:05 PM

I''ve had the same curiosity when I first started programming for Windows. If you look hard, it''s there... The WinProc function gets called somewhere buried deep in some other Win32 function Microsoft already designed... My suggestion is that you don''t lose your sleep on it and concentrate on your other programming issue. It''s like asking "Why do flowers bloom in Spring?" Your answer should be "I DON''T KNOW and I don''t care!!"