subtracting time

I'm having trouble calculating the correct time laps.

start_time = DateTime.Now
(program code)
Dim processing_time As TimeSpan = DateTime.Now - start_time
msgbox(processing_time.Minutes)

start - 3/13/2013 7:49:30 PM
end - 3/13/2013 10:57:10 PM

My result was 7 mins. It seems like my code is not subtracting the hours. How do I correct this?

Try

Code:

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msgbox(processing_time.TotalMinutes)

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..and about the subtraction i would use Subtract() method

Code:

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Dim MinCount As Double = DateTime.Now.Subtract(start_time).TotalMinutes

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How about using a Stopwatch

Code:

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        Dim stpw As New Stopwatch
        stpw.Reset()
        stpw.Restart()
        'code to be timed
        stpw.Stop()
        Debug.WriteLine(stpw.Elapsed.ToString)

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