The error was 32 but nobody else has this file open as far as I know. The filename was obtained using the CFileDialog class in the User interface thread but as far as I can tell this dialog does not actually open the file. It just returns the path and filename for you to open later which I am trying to do in the worker thread.

I have a MSVC++ 6.0 program that creates a worker thread and then performs file I/O using CStdioFile class. It works fine in Windows 98 but when I try to run the same program on windows XP, it fails to be able to open the files. I looked at permissions and logged in as the sys admin but it still fails to open the files. Any ideas? Chipg