Lesson 22: The CheckBox and the Option Button


22.1 CheckBox

The CheckBox is one of the controls in Excel VBA that allows the user to make a selection out of two or more items . For example, you may create a shopping cart where the user can click on checkboxes that correspond to the items they intend to buy. You can also program the shopping cart so that it can compute the total payment as well as allowing the user to update the shopping cart.

One of the most important properties of the checkbox in Excel VBA is Value. If the checkbox is selected or checked, the value is true, whilst if it is not selected or unchecked, the Value is False.

The usage of check box is illustrated in Example 22.1

Example 22.1

In this example, the user can choose to display the sale volume of one type of fruits sold or total sale volume. The code is shown below:

Private Sub CommandButton1_Click()

If CheckBox1.Value = True And CheckBox2.Value = False Then
 MsgBox "Quantity of apple sold is" & Cells (2, 2).Value
ElseIf CheckBox2.Value = True And CheckBox1.Value = False Then
 MsgBox "Quantity of orange sold is " & Cells(2, 3).Value
Else>
 MsgBox "Quantity of Fruits sold is" & Cells (2, 4).Value
End If

End Sub

The UI is shown in Figure 22.1

vba2010_figure22.1
Figure 22.1

22.2 Option Button

The option button control also lets the user selects one of the choices. However, two or more option buttons must work together because as one of the option buttons is selected, the other option button will be deselected. In fact, only one option button can be selected at one time. When an option button is selected, its value is set to "True" and when it is deselected; its value is set to "False".

Example 22.2

This example demonstrates the usage of the option buttons. In this example, the Message box will display which option button selected by the user. The output interface is shown in Figure 22.2.

The code

Private Sub CommandButton1_Click()

If OptionButton1.Value = True Then
 MsgBox "Option1 is selected"
ElseIf OptionButton2.Value = True Then
 MsgBox "Option2 is selected"
Else
 MsgBox "Option3 is selected"
End If

End Sub

The output UI

vba2010_figure 22.2
Figure 22.2

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