Re: Getting Information in different Procs.... in C!!!!

From:

"Igor Tandetnik" <itandetnik@mvps.org>

Newsgroups:

microsoft.public.vc.language

Date:

Fri, 13 Mar 2009 21:09:45 -0400

Message-ID:

<eEGNVGEpJHA.4896@TK2MSFTNGP05.phx.gbl>

"Robby" <Robby@discussions.microsoft.com> wrote in message
news:868F114A-F0CE-40FA-BC65-F92BFB6F0582@microsoft.com

So for example, suppose I have a structure that is typedefed which
holds the passcode as a long and I configure the pass code in a first
window procedure called WIN_PROC1. Then later when I am in
WIN_PROC2, I would like to access the pass code value while in
WIN_PROC1!

So, you store it somewhere. E.g. in a global variable. What again seems
to be the problem?

How does Windows allow this type of access. Remember, I am
not passing the structure from WIN_PROC1 to WIN_PROC2.... its like in
VC++ (native code) all Window procedures pass is a handle to a
window, a long for the message #, a LPARAM and a WPARAM only!!!!!

Well, if you don't like global variables, there are also ways to
associate arbitrary information with an HWND. See e.g. GetProp, SetProp.
--
With best wishes,
Igor Tandetnik

With sufficient thrust, pigs fly just fine. However, this is not
necessarily a good idea. It is hard to be sure where they are going to
land, and it could be dangerous sitting under them as they fly
overhead. -- RFC 1925