In this tutorial, I will show you how to write a program to ask the user to give a two time hours and then the program will compute the difference of the two time hours  in Microsoft Visual Basic NET programming language.

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Program Listing

Public Class Form1

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim dFrom As DateTime
        Dim dTo As DateTime

        Dim sDateFrom As String = Trim(TextBox1.Text)
        Dim sDateTo As String = Trim(TextBox2.Text)

        If DateTime.TryParse(sDateFrom, dFrom) AndAlso DateTime.TryParse(sDateTo, dTo) Then
            Dim TS As TimeSpan = dTo - dFrom
            Dim hour As Integer = TS.Hours
            Dim mins As Integer = TS.Minutes
            Dim secs As Integer = TS.Seconds
            Dim timeDiff As String = ((hour.ToString("00") & ":") + mins.ToString("00") & ":") + secs.ToString("00")
            TextBox3.Text = timeDiff
        End If

    End Sub

    Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button2.Click
        TextBox1.Text = ""
        TextBox2.Text = ""
        TextBox3.Text = ""

    End Sub
End Class

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