Time manipulations

Hi,

I'm trying to perform several manipulations to time values (all will be stored in a access database). I need to find the elapsed time between a start time and a finish time and I also need to be able to find the SUM of multiple time values.

I know how to do this first part of the using the following code but how do I add multiple time values together when they are in the "15:53:12" format?

TIA

Russ

Dim TimeStart, TimeStop As Date
Dim TimeDiff As TimeSpan

TimeStart = CDate(Me.txtTimeStart.Text)
TimeStop = CDate(Me.txtTimeStop.Text)

TimeDiff = TimeStop.Subtract(TimeStart)
Regards,
Russ

Code:

---

        Dim ts As TimeSpan = TimeSpan.Parse("15:53:12")
        ts = ts.Add(TimeSpan.Parse("00:10:00"))
        ts = ts.Add(TimeSpan.Parse("00:01:00"))
        MsgBox(ts.ToString)

---