Converting a single bond to a double bond

I'm looking for some help with the scripting function in Materials Studio 8.

I'd like to convert a single bond which already exists in a structure between atom1 and atom2 into a double bond. I'm assuming that the easiest way of doing this would be the Createbond function?

CreateBond(\\\$atom1, \\\$atom2, "Double")

Or do I need to do something more complicated and delete the existing single bond before creating the double bond? I'm stuck at this point as there doesnt appear to be a hand deletebond function that I can call up.

Any thoughts?

Jon