acad_helpdlg (AutoLISP)

Invokes the help facility (obsolete)

Supported Platforms: Windows only

Signature

(acad_helpdlg helpfile topic)
helpfile

Type: String

The path and file name of the help file to open.

topic

Type: String

The name of the topic to display in the help file.

Return Values

Type: String or nil

Returns the file name of the help file if it is found; otherwise, nil is returned if the file is not found.

Remarks

This externally defined function has been replaced by the built-in help function. It is provided for compatibility with earlier releases of AutoCAD.