Add a command to the command line interface. More...

Add a command to the command line interface.

The command syntax may specify multiple command forms, each separated by a newline '\n' character. The command named in each form must be the identical.

This is a light-weight function. A call to compile() is necessary to finalized command syntax processing.

Parameters

desc	Command description (see CmdDesc).
strSyntax	One or more extended usage syntax separated by newline characters.
fnExec	Command execution function of variant 1, 2, or 3.

Returns: On success, returns command's assigned unique id. Otherwise NoUid is returned.