NAME
    IsRexxMsg - Function to determine if a message came from ARexx

SYNOPSIS
    result = IsRexxMsg(msgptr)
    D0                 A0

    BOOL IsRexxMsg(struct RexxMsg *);

FUNCTION
    This function can be used to determine if a message came from an
    ARexx program.

INPUTS
    msgptr - A pointer to the suspected RexxMsg.

RESULTS
    result - A boolean:  TRUE if it is an ARexx message, FALSE if not.

SEE ALSO
    CreateRexxMsg()

BUGS