Product of Two Numbers in VB.NET

A simple program that I wrote using Visual Basic NET to ask the user to give two numbers and then the program will compute the product of two numbers and display the results on the screen.

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Sample Program Output

Program Listing

Public Class Form1

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

        Dim a, b, product As Integer

        If TextBox1.Text = "" Then

            MsgBox("Cannot Be Empty. Try Again")

            TextBox1.Focus()

            TextBox3.Text = ""

        ElseIf TextBox2.Text = "" Then

            MsgBox("Cannot Be Empty. Try Again")

            TextBox2.Focus()

            TextBox3.Text = ""

        Else

            a = Val(TextBox1.Text)

            b = Val(TextBox2.Text)

            product = (a * b)

            TextBox3.Text = product

        End If

    End Sub

    Private Sub Button2_Click(sender As Object, e As EventArgs) Handles Button2.Click

        TextBox1.Text = ""

        TextBox2.Text = ""

        TextBox3.Text = ""

        TextBox1.Focus()

    End Sub

    Private Sub Button3_Click(sender As Object, e As EventArgs) Handles Button3.Click

        End

    End Sub

End Class