Where did my main form go??

Question

New to VC# 2012 Express. Some experience with C, Python, VB and IDEs in general.

Doing great building my first program until I opened it for about the fifth time.
The main form isn't there.??
I can build the program and run it, so I know it is there. Nothing in the "View" menu seems to help.
How do I get it back, and what did I do to lose it? I'm afraid to do much. I don't want to lose the work I've done.