C or C++ for WinAPI

I have been told several different things on the internet. Both from experienced and not as experienced programmers. I have a piece of code that I have been working on. At the moment it spawns a processor and connects back to me (easy to guess what it is). I also added the ability for it to be added to the current user hkey in the registry so that way it can run on boot, but as I continue to program it... I have come to the conclusion that what I am going to add to it in the future might make it way to complicated for C which is what I was using so far. I am a bit leery of C++ because of the file size when it compiles (damn you stub...), but it can actually make everything much easier because of the native libs. Any ideas and thoughts are welcomed.