Microsoft Office 2000/Visual Basic Programmer's Guide

Displaying Help from Command Bars

In much the same way as forms, you can display both context-sensitive Help for custom command bar controls, and also call a standard Help topic when a user clicks a toolbar button or menu item. The same restrictions for displaying context-sensitive Help also apply to displaying standard Help topics: In Excel and PowerPoint, you can use the Help method of the Application object; in Word and Access, you must call the Help engine directly by using an API call.