What happens behind the scenes in Revit?  The Revit Command Prompt utility developed by Jose Guia can help you learn.

Here is a direct link to the addon:
http://blog.bimkicks.com/file.axd?file=2011%2f3%2fRevCmdPrompt.zip

To install:

  1. Download the ZIP
  2. Extract anywhere
  3. RIGHT CLICK the INSTALL.cmd file and select “Run As Administrator”
  4. Restart Revit.
  5. Under Add-Ins, External Tools, you will have a new option called Command Prompt

Via:
blog.bimkicks.com | REVIT COMMAND PROMPT – aww yeah!!!!!!!