I am label which display the current time ( label8.Text = DateTime.Now.ToString("HH:mm:ss"); ) but here i want on a button click the timer would alert on two minute (i.e time out)..

set timer to minutes : timer.Interval = 60000
on button click event put timer.start
in timer1_tick event each tick is a 1 minute so count the minutes
count = count + 1 and if count == 2 then alert and stop timer (timer.stop).
good luck