Endurion

Can't you use WM_KEYDOWN directly with VK_LBUTTON and it's siblings?

That .cpp/.c file where you entered that code, make sure you add it to the project. Right Click on the Solution Explorer and choose "Add". Once the file shows up there it should be compiled and linked.

What are the differences in bitness (32 vs. 64) between your and your friends system?

Are you exchanging the source only or the solution/vcproj files as well?

If only the first, make sure you have the same settings. That's what L.Spiro was on about, the project settings do not seem to match.

Nice. One major problem I see is that you don't get the instance of an object there. You're basically invoking the handlers with a NULL pointer.

If you want some more tested delegates for c++ look for FastDelegate. It's working across all compilers I encountered.

I still wish I could make an add handler routine that doesn't need a wrapper, just accepts the method name (as in C#)

You can choose to handle all or none.

Most important is that you pass ALL of them on to DefWindowProc unless you explicitely handle it and the docs say you can return a specific value from your WndProc.