Is anyone familiar with sending commands to the Mesh Editor via the WorkBench Command window or via scripting?

I've done alot of reading on other people attacking this problem but nothing seems to work for me.

- From the command window I try sending actions via "mesh.SendCommand(Command=....." but always get 'command is under defined' errors

- and from the scripting side of things I've tried uploading .js files while the Mesh editor is open that take the style of: ds.Script.doInsertMeshSize(); ListView.ActivateItem("Scoping Method"); ListView.ItemValue = "Named Selection"; ListView.ActivateItem("Named Selection"); ............ .........

.....

but that always gives me an error that states "undefined variable 'ds'".

Any advice or examples on this would be greatly appreciated.