what are the different types of Windows controls? What is the purpose of each?

Answer 1

Hard to tell if this is a serious question.

Tell you what: head over to http://www.microsoft.com and do a search on "Windows controls".

You'll get a few hits.

Let us know how that went. See you in 10 years.

Answer 2

You can find your answer here:
http://msdn2.microsoft.com/en-us/library/ms649779.aspx