Both the HTML Help window and browser provide several ways for users to close and exit the help project. You can also add a control that allows users to exit help from within a topic.
In the WYSIWYG Editor, click where you want to add the close window control in the topic.
Click Insert
HTML Help Control .
Select Close Window. The Close Window Wizard opens.
Set up the button options for the control.
If you are adding a standard button, click Next and set up the font options for the button label. You can assign a different font, style, and size. (This option does not apply to custom images or hidden controls.)
Click Finish. The control is added to the topic.
Note: To test the close window control, you need to compile the project.