GPA average calculator using C#

 This is GPA average Calculator NOT GPA calculator.

                                                        (INTERFACE)

SOURCE CODE:

Public Class Form1

    Private Sub Label3_Click(sender As Object, e As EventArgs) Handles Label3.Click

    End Sub

    Private Sub Label5_Click(sender As Object, e As EventArgs) Handles Label5.Click

    End Sub

    Private Sub Button1_Click(sender As Object, e As EventArgs) Handles Button1.Click

        Try

            Dim A1 As Double

            A1 = Convert.ToDouble(TextBox1.Text)

            Dim A2 As Double

            A2 = Convert.ToDouble(TextBox2.Text)

            Dim A3 As Double

            A3 = Convert.ToDouble(TextBox3.Text)

            Dim A4 As Double

            A4 = Convert.ToDouble(TextBox4.Text)

            Dim A5 As Double

            A5 = Convert.ToDouble(TextBox5.Text)

            Dim A6 As Double

            A6 = Convert.ToDouble(TextBox6.Text)

            Dim T As Double

            T = (A1 + A2 + A3 + A4 + A5 + A6)

            Dim A8 As Double

            A8 = Convert.ToDouble(TextBox8.Text)

            TextBox7.Text = Convert.ToString((T / 6))

            TextBox9.Text = Convert.ToString(((T / 6) + A8) / 2)

        Catch ex As Exception

        End Try

    End Sub

End Class