How to set opposite interval of timer control on textbox ?

For Example:
If we enter low value in textbox that progress bar speed is slow.
If we enter high value in textbox that progress bar speed is high.

Thank you....

one way is to use an array of intervals and when the user enters a number(1-5?) that's the index of the array and set the interval to that value.

Question already asked Here and we properly explained that.

Please don't create new threads with old questions (little practice you have made in order to solve the problem)