Sorry if you didn't understand the EZrotate documentation. Here is the command:
+ Code Snippetangle# = EZro_AngleBetweenPoints(originX#, originY#, originZ#, point1X#, point1Y#, point1Z#, point2X#, point2Y#, point2Z#)
Lets say you were trying to measure the angle between a chair that was sitting in front of you, and desk that was off to your left.
The command would look like this:
+ Code Snippetangle# = EZro_AngleBetweenPoints( YouX#, YouY#, YouZ#, ChairX#, ChairY#, ChairZ#, DeskX#, DeskY#, DeskZ# )
The command would basicly draw a line from you to the chair. Then it would draw another line from you to the desk. It would return the angle between those lines.
I hope this helps!