You can get SPSource to run within the Visual Studio IDE and write messages out to the Output window by following these easy steps.
Select Tools | External Tools...from Visual Studio menu.
Click Add button
Set Name to : SPSource
Set Command to: C:\Program Files\SPSource\SPSource.exe
(NOTE: may differ if installed on x64 machine or if you changed default location)
Set Arguments to: -designsite http://server:81/
(NOTE: this will differ depending on the design site you are currently using
Set Initial Directory to: $(ProjectDir)