>Can a component written in C# (Winform) be called from within vfp7? Are there any issues? IT decision-makers in our company wants to do that, but nobody here has ever done it before. Any comments appreciated.

Yes and no <g>...

Yes you can do it, but it requires some special work to make sure you get the threading right. The issue is that .NET cannot easily create DCOM (EXE) COM server - only DLL servers and DLLs run in process, so you end up with Windows Message Loop issues.

THere's more basic information here:

http://west-wind.com/weblog/posts/705.aspx

And there should be FoxPro Advisor article coming out shortly that talks in more detail about multi-threaded .NET COM components and comsuming them in VFP.