Application.InvokeHelp Method (Visio)

Performs operations that involve the Microsoft Visio Help system.

Version Added: Visio 2002

expression .InvokeHelp(bstrHelpFileName, Command, Data)

expression A variable that represents an Application object.

Parameters

Name

Required/Optional

Data Type

Description

bstrHelpFileName

Required

String

Specifies an HTML file, a URL, a compiled HTML file, or an optional window definition (preceded with a ">" character). If the command being used does not require a file or URL, this value may be "".

Command

Required

Long

The action to perform.

Data

Required

Long

Any data that is required based on the value of the command argument.

Return Value

Nothing

Using the InvokeHelp method, you can create a custom Help system that is integrated with the Visio Help system. To enable your custom Help to appear in the same MSO Help window as Visio Help, do not specify a window definition in the bstrHelpFileName argument.

The arguments passed to the InvokeHelp method correspond to those described in the HTML Help API. For a list of command values, see the HTML Help API Reference on MSDN, the Microsoft Developer Network. Microsoft Visual Basic programmers can use the numeric equivalent of the C++ constants defined in the HTML Help API header files.

For example, use the following code to display the Visio Help pane:

Application.InvokeHelp "Visio.chm", 15, 0

For more information about the HTML Help API, search for "HTML Help API overview" on MSDN.

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