How can I tell what version of Visual Studio was last used to work on a project?

Question

I\'m working with some older code, and I think the person who last built it was using Visual Studio 6. There\'s no .vcproj file, but the .dsp and .dsw files have the following h

Answer 1

Check the binary signatures in the compiled files.
By this you can get compiler version.
By compiler version you can get Visual Studio version.

By compiler I mean not only cl.exe, but resource compiler, linker, etc. Do you have some compiled materials?