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You didn't attach code. You had a link to a site that my browser policies refuses to go to.

Actually attach the code, don't link to another site.

Regards,

Paul McKenzie

You are specifying a constant, and now it doesn't work? Before you said it did work when you specify a constant.

Regards,

Paul McKenzie

Programmers get fired for saying that, and especially if they're using C++ where crashes can occur due to the fault of the programmer.

Therefore, you must always assume it is your code unless you...

Sounds like heap corruption to me.

First, does this entire application consist of more than one executable module (DLL, EXE)? If so, and if you're passing CString between executables, then you...

And the function prototype for put_FileName is what exactly? Is it this?
http://msdn.microsoft.com/en-us/library/windows/desktop/dd694558%28v=vs.85%29.aspx

If so, then a CString is not a BSTR.
...

And how is this field set in terms of C++?

In other words, a description of what you did is not enough. Show the actual code you claim sets this field. This is especially the case when it...

Nowhere do you mention that you tried to debug the problem using the debugger.
Google doesn't solve these problems -- you need to actually debug the issue by launching the application under the...