Microsoft KB Archive/161326

= XL97: How to Verify the Value of a CheckBox on a UserForm =

Article ID: 161326

Article Last Modified on 11/23/2006

-

APPLIES TO


 * Microsoft Excel 97 Standard Edition

-



This article was previously published under Q161326



SUMMARY
In Microsoft Excel, 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.



MORE INFORMATION
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 a Microsoft Certified Partner or the Microsoft fee-based consulting line at (800) 936-5200. For more information about Microsoft Certified Partners, please visit the following Microsoft Web site:

https://partner.microsoft.com/global/30000104

For more information about the support options that are available and about how to contact Microsoft, visit the following Microsoft Web site:

http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

CheckBox Behavior
By default, Microsoft Excel 97 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.

Visual Basic for Applications Macro Example
 Close and save any open workbooks, and then open a new workbook. Start the Visual Basic Editor (press ALT+F11). If the Properties window is not visible, click Properties on the View menu (or press F4). On the Insert menu, click UserForm. Draw a CheckBox control on the UserForm. Activate the Properties window (press F4). Change the value of the TripleState property to True .</li> Draw a Label control on the UserForm.</li> Double-click the CheckBox to display the Code window for the UserForm.</li> Click Change in the Procedure list.</li>  In the module, type the following code for the CheckBox1 Change event: 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 </li> Run the UserForm.</li></ol>

When you click the CheckBox control, the value of the label changes. When you are finished, close the UserForm.

<div class="references_section">