I have been looking through the API discussion and have only found one post that addressed this but did not get to an answer so I will try again.  If anyone knows a post that answers this please point me there or tell me the key words to be searching.

What I want to do is revolve a feature which in itself is not that complicated.  I can get my sketch started and draw the basic profile and draw the revolve line.  So far so good, the problem is when I go to apply the dimensions.  When I do this my self I would pick the line to dimension, the revolve line, and then click in the area the opposite side of the revolve line to get a diameter dimension.  When I try to do this with the API it just creates the radius dimension.  I have tried setting diametric to true with the API and that does not help.  If I go back to the sketch and look at the dimension properties I can set the dimension to a diameter and it looks right.  I am using sw2010 sp 2.1.  I admit I am a noob and am probably missing something simply.  Any help would be appreciated.