Altering right- and double-click behavior

#1
When I double-click an entity, I don't want to have the properties window pop up. I'd rather have nothing happen. It can be done by undefining the _entprop command, but is there another way?

Also, I'd like to have IntelliCAD not repeat the last command when I right-click with no objects selected. I'd rather have nothing happen. Is that possible?

I'm developing a simple CAD utility for non-CAD users, and want to disable options that they don't need to use.

Thanks...

Kenn