>I glanced over that and it looks like creating a user control from scatch or in one case, subclassing from the standard controls, not visually subclassing. The difference is in the visual subclassing ability - even in the example you shared you have to manually add code. Or did I miss something?
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>>Dunno about asp, but in a winforms enviromment, think it is called a user control.
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>>http://msdn.microsoft.com/en-us/library/aa302342.aspx
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>>I have not actually done it - so I can be wrong


You can create a user control and subclass from that visually simply by adding a " : mycontrol" to the constructor definition. You can inherit multiple levels this way.