Re: Multiple calling of OnCreate ?
On 8 May 2006 00:30:40 -0700, "voytello" <voytello@gmail.com> wrote:
Hello
I am using the OnCreate function in my app. This app has one window -
the dialog based project in Visual 6.0
In that function (OnCreate) I make some initialization, such as:
::CoInitialize(NULL) and other things. Also, write some info to the
logfile (strictly about communication with dll's that I am using).
My program is running continually few days, without any restarts etc.
and today I looked up into this logfile, and I saw that function that I
call only in OnCreate were called many times.
I thought that OnCreate is called once... Msdn in remarks of OnCreate:
"The CWnd object receives this call after the window is created but
before it becomes visible. OnCreate is called before the Create or
CreateEx member function returns."
I don't know what is happening...
If you're handling WM_CREATE in your dialog class, it would be more typical
to handle WM_INITDIALOG. There are a few obvious potential causes of your
problem:
1. You're handling OnCreate for a class that's instantiated multiple times.
2. You're calling your functions from places besides this OnCreate handler.
3. You're writing wrong information to your logfile.
It would be helpful to print a stack trace to your logfile, but that's
somewhat hard to do in C++. You could start by instrumenting OnCreate to
log itself upon entry. If it doesn't appear immediately before the suspect
functions, then (2) or (3) could be the reason. If you can run a debug
version, set a breakpoint on OnCreate and look at the stack whenever its
entered.
--
Doug Harrison
Visual C++ MVP
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