If you´re willing to put a timer on a form, just drop it into the form, set its Interval property to the amount of time (in milliseconds) you want the time works, and put your code into the Timer Method of the Timer Control.
If you´re willing to use a timer in some other place (not a form...), it´s just a matter of instantiate a class you built based on Timer baseclass.
HTH
Claudio Lassala