How to detect a progam calling "OpenFile" and what the name/path of the file is?

I have a program (just exe) that is not able to OpenFile.

Its a log file to write to so I just need to place an empty file.

But I don't know the name or location of it, and have dug around the registry and ini and inf files to no avail.

Should I use a system hook开发者_开发问答?

The Process Monitor tool will let you see which files a program is using in real time.