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  Description:  Get Machine Name     DOS 3.1 Only
 
  Returns the address of an ASCIIZ (null-terminated) string identifying
  the local computer. This function call is only available when Microsoft
  Networks is running.
 
  Input                            Output
  ═════════════════════            ═══════════════════════════════════════
  AH=5EH                           If function successful
  AL=00H                           Carry flag=clear
  DS:DX=segment:offset             CH=00H     if name not defined
   of buffer to receive               < > 00H if name defined
   string                          CL=netBIOS name number (if CH < > 0)
                                   DX:DX=segment:offset of identifier (if
                                    CH < > 0)
                                   If function unsuccessful
                                   Carry flag=set
                                   AX=error code
                                    -♦-