User Controls Vs Custom Controls, Looks similar. But here is the difference.

Hi,
Generally the programmer feels that the custom controls and user controls are similar in nature.
(Almost not exactly.)

But there are lot of differences between these two in nature and in execution.
Here are some cool links to have a look at them.

http://support.microsoft.com/kb/893667
http://steveorr.net/faq/UserCustom.aspx
http://www.oreilly.com/catalog/progaspdotnet/chapter/ch14.html