I would like to reset timer4 each time I click a button?

If this is VB4/5/6

Then one method is :

Timer4.Enabled = False
Timer4.Enabled = True

One is generally better off having a shorter interval, and checking
whether a target DateTime has been passed, rather than having one huge
wait.
It is a bit more obvious and flexible
- also Timers are not terribly accurate
- particularly if you do a lot of work when they fire

If you want to reset time afte 10 second
U can start timer 
   dim i as integer
  In forms_load() event
   i=1
   timer1.interval=500
   timer1.start()
  
  
In timer_tick event
   i = i+1
   if i=10 then
      timer1.interval=500
      i=0
   end if