Re: function in DLL

From:

"Bruno van Dooren [MVP VC++]" <bruno_nos_pam_van_dooren@hotmail.com>

Newsgroups:

microsoft.public.vc.language

Date:

Mon, 2 Oct 2006 10:13:01 +0200

Message-ID:

<#gw9Vqf5GHA.3404@TK2MSFTNGP03.phx.gbl>

But is it bad to have a global and static variable which stores the string
?

for sure when you are out of function local variables are destroyed, but
if you store the content of an TCHAR array to a global/static variable.
this should work and always be available are it is saved by value...

You could use a global variable and use that, but that would also mean that
your functions are not threadsafe.
That is why you should always let the caller provide you with a buffer.

What you do is you return a pointer to a stack based variable, but whatever
is on the stack gets deleted (or at least unreliable, and possible corrupt)
by the time you try to read it.

Your pointer is static, but your storage array is local to the stack.
strRes might still point to the same place, but what is there is likely not
what you wrote there when it was still a string resource.

--

Kind regards,
    Bruno van Dooren
    bruno_nos_pam_van_dooren@hotmail.com
    Remove only "_nos_pam"