>>>The github dotless documentation shows how to execute dotless.compiler.exe in the command line. Example:
>>>

>>>$ dotless.Compiler style.less style.css
>>>

>>>What I don’t understand is how to bring up the Command Window in the VS 2012.
>>
>>Ctrl +W,A
>>or menu: View, Other Windows, CommandWindow
>>
>
>Not in my VS 2012 Web Express. I go to View ->Other Windows -> and several items but no Command Windows. Thank you.

Ah. Partial workaround : http://alinconstantin.blogspot.co.uk/2012/08/command-window-and-immediate-window-are.html