Changing my Locations.

[EtaCarinae]

Hey there.
I'm trying to program a virtual working Solar System in real time.
I've got all my formula's for gravity, centripetal force, orbital velocity, and I've related them to my code and how to change the x and y values as the object orbits another orbit.
My only issue is Location.
I can only seem to set my location to integers like (32,32). Where-as I would like to set them to positions with a decimal place to make things more accurate and run more smoothly. Like (32.43,32.43).
Is there anyway to do this?
I just keep getting that it is "not a valid value for Int32.".

[Arjay]

If you've created the methods, declare them as double, not int.