Compound Interest in VB.NET

 A simple program that I wrote that shows how to compute compound interest using Microsoft Visual Basic NET.

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Program Listing

Public Class Form1

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

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        Dim a, b, c As Double
        Dim total, interest, amount As Double
        Dim compound_interest As Double
        a = Val(TextBox1.Text)
        b = Val(TextBox2.Text)
        c = Val(TextBox3.Text)
        total = a * b * c
        interest = total / 100
        amount = a * Math.Pow((1 + b / 100), c)
        compound_interest = amount - a
        TextBox4.Text = FormatCurrency(compound_interest)
    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 = ""
        TextBox4.Text = ""
        TextBox1.Focus()
    End Sub
End Class