Hi Listers, Many years ago I experimented with a project that read information from the header of a DOS .exe file. I had a resource book that told me at what offset the various items of information were stored. It also pointed out that the layout of the header of a .exe file for Windows was quite different, but did not go into detail. Now I would like to go into the file header again, this time for Windows executables. I have been looking at a file mapping API, but couldn't really figure what it was all about, or even whether it was what I really wanted. Could anyone offer information on this, or point me to some good, accessible information? As always, any ideas will be gratefully received. All the Best. Ian Ian D. Nichols, Toronto, Canada