I have gone over chapters 10 and 12 in great detail (user controls and web services, respectively) and even made up a few of my own. User controls can have a visible user interface while web services cannot.

Except for that, I do not have a good handle on when to use one or the other. None of the controls and web services I would write for a project would likely be used by anyone outside of my own shop.

Does anyone have a rule of thumb to help them decide when to use which in such
a closed shop?

Are there any significant performance differences, any build time differences, module size differences, or anything else, where one has the advantage over the other?

VV