Answer / santhi sri

user control
1)created by user,easy to create difficult to use.
2)cannot be added to toolbar
3)a seperate copy of the control is required each
application
custom control:
1)they are predifined
2)can be added to toolbar
3)one single copy of control ia required

Answer / prabhakar.

A user control is made up of existing controls. It is also
sometimes referred to as a composite control because of this
fact. A typical example is a login form. The form and all of
the logic is contained within this 'reuseable' user control.

A custom control is a control that you create. In windows
forms this means overriding the OnPaint method as in your
example above. Custom controls do not have the same level of
design time support as user controls do (ie dragging and
dropping existing controls, etc). Custom controls are
generally thought of as reuseable components that can be
added to the toolbox of visual studio, so they would have
more generic functionality to fit across projects (e.g. a
round button).

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