Fortunately theres a function to do so, try this if you're trying to get the difference between the hours...
The date constructors:
And the function in action:Code:Dim Date1 As Date = #12/20/2013 8:20:59 PM# Dim Date2 As Date = #12/20/2013 11:20:59 PM#
Alternatively, you can convert the times to seconds, subtract them and then change them back to the time format.Code:Label1.Text = DateDif(DateInterval.Hour, Date1, Date2)