Hi,
You can use them, by reading header file and .cdl file. and of course, documentation.
I have used them, but for a professional application, they couldn't provide enough customazation, for example, AIS_AngleDimension always drawn by two AIS_Line directions, not by your final Rubber-banding point. Then you may want to write yourself's AIS_DimEx.
regards,
Commenter-1