If you know of any web sites where people can download custom source code for the CoCreate applications, please post it in this sticky thread which will always be at the top of the Customization forum. As a start, below is a link to the Macro Site of the
CoCreate America's User Group which has several examples of ME10/Drafting macros. There is also some LISP code from old versions of SolidDesigner. Although it hasn't been updated in some time, people trying to learn macro programming may find it of interest.
http://www.cocreateusers.org/macros/macro.htm