Area of the Circle in Visual Basic NET

Here is another simple program that I wrote using Microsoft Visual Basic NET to ask the user to give the radius of the circle and then our program will compute it's area based on the given radius value of the user.

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Sample Program Output

Program Listing

Public Class Form1

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

        Dim compute_area_circle As Double

        compute_area_circle = (Val(TextBox1.Text) * Val(TextBox1.Text) * 3.1416)

        Label4.Text = "The Area of the Circle is " & Format(compute_area_circle, "0.00")

    End Sub

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

        TextBox1.Text = ""

        Label4.Text = ""

        TextBox1.Focus()

    End Sub

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

        Dim result As DialogResult = MessageBox.Show("Do you want to quit?", _

                               "Quit Program", _

                               MessageBoxButtons.YesNo)

        If (result = DialogResult.Yes) Then

            End

        Else

            TextBox1.Text = ""

            Label4.Text = ""

            TextBox1.Focus()

        End If

    End Sub

    

End Class