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        Communicating Applications Spec - Find first queue entry

        Entry:
          AX = CB05h
          CX = status of events to find
              0000h successful completion
              0001h waiting to be processed
              0002h number has been dialed
              0003h connection established, sending
              0004h connection established, receiving
              0005h even aborted
              FFFFh find any event, regardless of status
              other negative values, match error code
          DH = direction
              00h chronological order, earliest to latest
              01h reverse chronological order, latest to earliest
          DL = queue to search
              00h task queue
              01h receive queue
              02h log queue
        Return:
          AX = 0000h successful
            BX = event handle for found event
          < 0      error code (see AX=CB01h)