PxHelpTopicTree

Gamma/Photon: Using Gamma™ with the Photon microGUIŽ, Version 4.0
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# `PxHelpTopicTree`

`PxHelpTopicTree` -- loads a topic tree into a helpviewer.

## Syntax

    PxHelpTopicTree (topic_tree)

## Arguments

`topic_tree`

  A string containing the path to a .toc file.

## Returns

t if successful, otherwise nil.

## Description

This function opens the helpviewer and loads a new topic tree, such as a user-defined table of contents. The topic tree must exist in a .toc file.

## Example

        Gamma> PxHelpTopicTree("/home/robert/topics.toc")
        t <The helpviewer shows the topic tree.>

## See Also

PxHelpQuit, PxHelpTopic, PxHelpTopicRoot, PxHelpUrl, PxHelpUrlRoot

and in Photon documentation: helpviewer.

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`PxHelpTopicRoot` | Up | `PxHelpUrl`

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