Why do we use UserControl?

Question

ı have been serching this for a while but I couldn\'t come up with a conclusion. What is UserControl? For me we can do everything with creating new windows forms instead of

Answer 1

A user control is basically a grouping of other existing control, intended as a reusable component (i.e. composite control). If you need to place the same group of controls on different windows you'd rather group them in a user control, adding things like data validation for instance, and then reuse this control whenever you need it.

Here is some more reading.