Procedures in Visual Basic

We will end with a program that uses both procedures and functions.

Start a new application and name it Tips. Build the program as shown below:

running program

The maximum on the scroll bar is 10000 so that we can select and dollar amount from 0.00 to 100.00.

All the names of the controls can be determined from the code.

Write the code as shown below:

Public Class Form1
    'Programmer: Janet Joy
    'Calculate tip
    Dim cost As Double
    Dim tipPercent As Integer
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        'set tags for radio buttons: tags can be used for any purpose
        RadBad.Tag = 10
        RadGood.Tag = 15
        RadExcellent.Tag = 20
        tipPercent = 15 'because good is selected
    End Sub
    Private Sub HSBMealCost_Scroll(sender As Object, e As ScrollEventArgs) Handles HSBMealCost.Scroll
        cost = HSBMealCost.Value / 100
        LblCost.Text = Format(cost, "$0.00") 'format numbers to 2 decimal places
        showTip()
    End Sub

    Private Sub RadGood_CheckedChanged(sender As Object, e As EventArgs) Handles RadGood.CheckedChanged, RadBad.CheckedChanged, RadExcellent.CheckedChanged
        'Get the tiprate from the check button
        tipPercent = sender.tag
        showTip()
    End Sub

NEXT: Dialogs in Visual Basic