handle's

dear prog
i have been learning to program, and the term handle has started to pop around while i was reading so code (sort of) so , could anyone share some ligth, and tell me what a hadnle is, how to use it and its usefullnes?

Thread reported for being off topic, but here's your answer:

A handle is a part of, or attachment to, an object that can be moved or used by hand. The design of each type of handle involves substantial ergonomic issues, even where these are dealt with intuitively or by following tradition.