Convert Difference between 2 times into Milliseconds?

Question

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

Answer 1

To answer the title-question:

DateTime d1 = ...;
DateTime d2 = ...;
TimeSpan diff = d2 - d1;

int millisceonds = (int) diff.TotalMilliseconds;

You can use this to set a Timer:

timer1.interval = millisceonds;
timer1.Enabled = true;

Don't forget to disable the timer when handling the tick.

But if you want an event at 12:03, just substitute DateTime.Now for d1.

But it is not clear what the exact function of textBox1 and textBox2 are.