I'd like to know how to create tabs under the properties window, and of course, how to put objects under those tabs. I'm coming to a point where having some 20 odd uniforms all jammed under the same default "Parameter" tab gets a bit messy.
I know it can be done, like in the following screenshot by GT. (BBCode image resizing somehow doesn't work. Click on the image to see the full picture. Property widget is on the right hand side of the screenshot.)

I searched in the official shader help document for a while, but found nothing relevant to this. Would be nice if anyone could help.
BR
-C