>I have removed one particular form and one particlar prg file from my Project, but when I do a build, it keeps pulling them back in. I have searched and searched for references to them by other resources in the Project, but I do not see any.
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>How can I tell what is pulling these files into the Project and make it stop?
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You removed them from project but they are in your path.
Just make sure that these files not exists (rename, move somewhere) and try to rebuild the project. It will tell you where it needs them.