OpenSTAAD Units

How do I programatically determine the units returned by OpenSTAAD when retrieving the moments Mx,My,Mxy for plates.  I have included the functions like "etOutputUnitForMoment", and "GetOutputUnitForStress", but they return a number  is there a table that documents the numbers that are returned.  I can change the "Force Units" in the file and get different results, but know way to understand what units are returned without coing into STAAD to check.