VB6 - How rotate a circle? (and other graphic questions)

I'm just trying to simulate the wheels of a train running. So I've to rotate 2 circles and the lines inside the circle (shape control).
My first questions is: How to rotate a circle?
My second question: Can I "join" the shapes in a way when I move one, the rest follow to the moving one? Or I need to write the code to move each piece individually at the same time?

I'm using 2D and the final movement would be similar to this:
I use front view (not 3D and not angular vision)
https://www.youtube.com/watch?v=ACUPIyUhlXc

Does this link help?
http://www.youtube.com/watch?v=24D1FYr8tgo

Not too much...

Chooo-Chooo!