NAME
        GetAmigaGuideMsg - Receive async AmigaGuide message.    (V34)

   SYNOPSIS
        msg = GetAmigaGuideMsg (handle);
        d0                       a0

        struct amigaguidemsg *getamigaguidemsg (amigaguidecontext);

   FUNCTION
        This function returns a SIPC message from the AmigaGuide system,
        if there is a message available.

   INPUTS
        handle - Handle to a AmigaGuide system.

   EXAMPLE

        amigaguidecontext handle;
        struct amigaguidemsg *agm;

        /* get a AmigaGuide message */
        while (agm = GetAmigaGuideMsg(handle))
        {
            /* process the event */
            switch (agm->agm_Type)
            {
                case ToolCmdReplyID: /* a command has completed */
                    if (agm->agm_Pri_Ret)
                    {
                        /* An error occurred, the reason is in agm_Sec_Ret.
                         * The command string is in agm_Data
                         */
                    }
                    break;

                case ToolStatusID: /* status message */
                    if (agm->agm_Pri_Ret)
                    {
                        /* an error occurred, the reason is in agm_Sec_Ret */
                    }
                    break;

                default:
                    break;
            }

            /* reply to the AmigaGuide message */
            ReplyAmigaGuideMsg(agm);
        }

   RETURNS
        msg -- Pointer to a SIPC message or NULL if no message was
            available.

   SEE ALSO
        openamigaguideasynca(), amigaguidesignal(), replyamigaguidemsg()