ID: Q183182
The information in this article applies to:
In Microsoft Excel 98 Macintosh Edition, a CheckBox control on a UserForm can have one of three values: True, False, or Null. This article contains a sample macro that programmatically retrieves the value of a CheckBox control.
By default, Microsoft Excel 98 allows you to set the value of a CheckBox control to True or False. A True value indicates that the CheckBox control is selected; False indicates that the CheckBox control is cleared.
You can also set a CheckBox control to a third value called Null. Note that before you can set the Null value, you must set the TripleState property of a CheckBox control to True.
A CheckBox control set to Null is shaded. Note that when you set the TripleState property of a CheckBox control to True, the Value of the check box is set to the following values in the following order: False, Null, and True.
When you set the value of a CheckBox control to Null, the Click event for the check box is not executed. If you want to check for a Null value when you click a CheckBox control, use the Change event.
Microsoft provides programming examples for illustration only, without warranty either expressed or implied, including, but not limited to, the implied warranties of merchantability and/or fitness for a particular purpose. This article assumes that you are familiar with the programming language being demonstrated and the tools used to create and debug procedures. Microsoft support professionals can help explain the functionality of a particular procedure, but they will not modify these examples to provide added functionality or construct procedures to meet your specific needs. If you have limited programming experience, you may want to contact the Microsoft fee-based consulting line at (800) 936-5200. For more information about the support options available from Microsoft, please see the following page on the World Wide Web:
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1. Close and save any open workbooks, and then create a new workbook.
2. Start the Visual Basic Editor (press OPTION+F11).
3. On the Insert menu, click UserForm.
4. Draw a CheckBox control on the UserForm.
5. Switch to the Properties window (press F6).
6. Change the value of the TripleState property to True.
7. Draw a Label control on the UserForm.
8. Double-click the CheckBox to display the Code window for the
UserForm.
9. Click Change in the Procedure list.
Private Sub CheckBox1_Change()
' Evaluate the value of the CheckBox.
Select Case CheckBox1.Value
Case True, False
' Set the caption of the Label to the value of the
' CheckBox.
Label1.Caption = CheckBox1.Value
Case Else
' If Null, set the Label's caption appropriately.
Label1.Caption = "Null"
End Select
End Sub
When you click the CheckBox control, the value of the label changes. When you are finished, close the UserForm.
For more information about CheckBox controls, click the Office Assistant while in the Visual Basic Editor, type "checkbox," click Search, and then click to view "CheckBox control."
For more information about the TripleState property, click the Office Assistant while in the Visual Basic Editor, type "triplestate," click Search, and then click to view "TripleState Property."
NOTE: If the Assistant is hidden, click the Office Assistant button on the Standard toolbar. If Microsoft Help is not installed on your computer, please see the following article in the Microsoft Knowledge Base:
ARTICLE-ID: Q179216
TITLE : OFF98: How to Use the Microsoft Office Installer Program
Keywords : kbcode kbprg kbdta xlvbahowto xlvbainfo OffVBA
Version : MACINTOSH:98
Platform : MACINTOSH
Issue type : kbhowtoLast Reviewed: May 18, 1999