Import an existing module into vb 2008

Can you help me please?

I want to create a file (presumably a module) where I can keep all of my constant definitions so that I can import into my projects.

I don't want to add the module to the solution because, as I understand it, that merely puts a copy of the module into the solution. If I add a new constant to it I have to update the master copy. I would rather keep the master copy open and add to that.

Can you tell me if this is possible and if so how?