Chapter 4, Problem 2MQ8

Explanation of Solution

Specifying the default radio button:

The radio buttons in a group are used to choose only one choice from a group of two or more radio button controls, but the choices must be different in a form.

• When a radio button is selected, its Checked property contains the Boolean value “True”.
• Otherwise, its checked property contains the Boolean value “False”.
• The selection structure (Either If…Then…Else or Select…Case) determines whether the radio button is selected or deselected by the user.
• The selection structure is coded inside the radio button’s Click event procedure.
• Consider the following example, this shows whether the radio button is selected or deselected by the user.

    Private Sub radSem1_Click(ByVal sender As Object,

    ByVal e As System.EventArgs) Handles radSem1.Click

        ' Check if the ‘radSeminar1’ radio button is

        ' selected

        If radSem1...