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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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 = "" TextBox1.Focus() End Sub End Class