title: Convert Difference between 2 times into Milliseconds?
body: <p>I have two masked TextBox controls and was wondering how I'd go about getting the time in each one and then converting the difference into milliseconds. Like, say in tb1 I write "12:01" and in tb2 I write "12:02", and then click a button. Once the button's clicked it starts a timer and at 12:02 a messagebox will be displayed. I know how to do all of it except for the time conversion part.</p>
  
  <p>How can it be achieved?</p>