How to get the starting/base address of a process in C++?

I'm testing this whole base/static pointer thing by using it on Microsoft's Spider Solitaire. So I got the base pointer of the amount of "moves" the player has used, and cheat engine tells me it's "SpiderSolitaire.exe+B5F78". So now I'm stuck on how to figure out what the starting address is of SpiderSolitaire.exe (of course this changes every time the program starts). How do I find the starting address of SpiderSolitaire.exe so I can add the offsets and get the real address of the "moves" value (in c++ of course)?