File list (Check if you may need any files):
src
...\AP
...\..\build_ap.BAT
...\..\DAPDL.CFG
...\..\DOS4GW.EXE
...\..\DOWNLOAD.BAT
...\..\GWDL.EXE
...\..\Userap.H
...\..\USERLOC.CMD
...\..\XJGW103.C
...\..\XJGW103.err
...\..\XJGW103.HEX
...\include
...\.......\cf_defs.h
...\.......\cf_extr.h
...\.......\COMAPI.H
...\.......\Commctr.h
...\.......\Connect.H
...\.......\DAPAPI.H
...\.......\DataType.H
...\.......\Debug.H
...\.......\GW21SAPI.H
...\.......\GW_API.H
...\.......\Iec.h
...\.......\IEC103.H
...\.......\queue.H
...\.......\SubData.H
...\.......\Sysinfo.h
...\.......\TCPAPI.H
...\.......\TCPDEF.H
...\.......\Userap.H
...\.......\Userdata.h
...\.......\vssver.scc
...\.......\XJ_GW.H
...\lib
...\...\GW21SAPI.LIB
...\...\GW_LIB.BAK
...\...\GW_LIB.LIB
...\...\SSILCE.LIB
...\LibSRC
...\......\Build_lib.BAT
...\......\cfc.c
...\......\CFC.OBJ
...\......\Commctr.c
...\......\COMMCTR.OBJ
...\......\Connect.c
...\......\CONNECT.OBJ
...\......\Debug.C
...\......\DEBUG.OBJ
...\......\gw_lib.err
...\......\GW_LIB.LST
...\......\Iec.c
...\......\IEC.OBJ
...\......\IEC103.C
...\......\IEC103.OBJ
...\......\Queue.C
...\......\QUEUE.OBJ
...\......\SubData.C
...\......\SUBDATA.OBJ
...\......\Sysinfo.c
...\......\SYSINFO.OBJ
...\......\UserData.C
...\......\USERDATA.OBJ
...\obj
...\...\S_G21S21.OBJ
...\tools
...\.....\CL.EXE
...\.....\EXE2OMF.EXE
...\.....\LIB.EXE
...\.....\LINK.EXE
...\.....\XOH86.EXE