What IDE is being used in this article...

Hi Guys, I was curious if anyone knew what IDE was being used in this tutorial (link below)? I'm using .NET studio currently, is there a better IDE to use for Torque dev.? Thanks for any help!

http://tdn.garagegames.com/wiki/TGB/Components:_GuiEditor#Your_First_taste:_a_typical_editing_session