Subtract current track time from total track time

Hey all i have a song playing that displays the time like so:

0:00 / 4:47

The first time is the tracks current time. The second is the total track time of that song playing.

I split it like so:

Code:

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Dim tmpTimes As Array = lblSongTime.Text.Split("/")

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So tmpTimes(0) gives me 0:00 and tmpTimes(1) gives me 4:47.

Now i tried to subtract the tmpTimes(1) from tmpTimes(0)

Code:

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Debug.Print(CDbl(tmpTimes(1).replace(":", "") - tmpTimes(0).replace(":", "")))

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and i get: 447.. 446... 445... etc

What kind of calculation do i need in order to return a descending count?

Example: 4:47...4:46.....4:45...etc using the current time tmpTimes(0)?

Solved:

Code:

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Dim times As String() = lblSongTime.Text.Split("/"c)
Dim elapsedTime As TimeSpan = TimeSpan.ParseExact(times(0).Trim(), "m\:ss", Nothing)
Dim totalTime As TimeSpan = TimeSpan.ParseExact(times(1).Trim(), "m\:ss", Nothing)
Dim remainingTime As TimeSpan = totalTime - elapsedTime

Debug.WriteLine(remainingTime.ToString("m\:ss"))

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