Public Sub LoopTask(ByVal secondsToRun As Integer)
    Dim startTicks As Integer = My.Computer.Clock.TickCount
    Do While IsTimeUp(startTicks, secondsToRun)
        ' Code to run for at least secondsToRun seconds goes here.
    Loop
End Sub

Private Function IsTimeUp( 
    ByVal startTicks As Integer, 
    ByVal seconds As Integer 
) As Boolean
    ' This function throws an overflow exception if the
    ' tick count difference is greater than 2,147,483,647,  
    ' about 24 days for My.Computer.Clock.TickCount.

    ' Use UInteger to simplify the code for roll over.
    Dim uStart As UInteger = 
        CUInt(CLng(startTicks) - Integer.MinValue)
    Dim uCurrent As UInteger = 
        CUInt(CLng(My.Computer.Clock.TickCount) - Integer.MinValue)

    ' Calculate the tick count difference.
    Dim tickCountDifference As UInteger
    If uStart <= uCurrent Then
        tickCountDifference = uCurrent - uStart
    Else
        ' Tick count rolled over.
        tickCountDifference = UInteger.MaxValue - (uStart - uCurrent)
    End If

    ' Convert seconds to milliseconds and compare.
    Return CInt(tickCountDifference) < (seconds * 1000)
End Function