WhatsThisButton Property
Applies To  
Form.
Description
You can use the WhatsThisButton property to specify whether a What's This button is added to a form's title bar.
Note   You can't display the What's This button on the title bar of a form unless the MinMaxButtons property is set to None.
Setting
The WhatsThisButton property uses the following settings.
| Setting | Description | Visual Basic | 
|  | 
| Yes | A What's This button appears on the title bar. | True (–1) | 
| No | (Default) A What's This button doesn't appear on the title bar. | False (0) | 
You can set the WhatsThisButton property by using the form's property sheet, a macro, or Visual Basic.
This property can be set only in form Design view.
Remarks
Clicking the What's This button on the title bar of a form causes the question-mark mouse pointer to appear. With the question-mark pointer, you can click any control to access its custom Help topic specified by the control's HelpContextID property. If the control doesn't have a custom Help topic, the form's custom Help topic is displayed. If neither the form or the control has a custom Help topic, Microsoft Access Help is displayed.See Also  
ControlTipText property, HelpContextID, HelpFile properties, MinMaxButtons property.