my Question is more complicated. I've wrote Perl script to build my applications using 'nmake' command and base on 'MAK' and 'DEP' files that were generated from Visual C++ based on 'DSP' files. Today, I'm generating 'MAK' and 'DEP' files from Visual C++ to my project and then using them to build my application with 'nmake' command from Unix The 'MAK' is product of 'DSP' files and I don't have problem to generate from Visual C++ to my requirement. I found that Visual C++ can generated 'DEP' file as well, but it generate it just if the project was compiled and already has 'vc60.idb' file. 'vc60.idb' file is an internal DB file of Visual C++ that include information about the project like the dependency relations... I don't want to compile each time my project via Visual C++ and then generate the DEP file - I would like to avoid from my dependence in that tool... Therefore, I would like to write or use any tool to generate 'DEP' files independently that 'nmake' command can use/read them. I Hope that my explanations are clear enough and you can help me or give me any idea... Thanks