This is part of Win16 API which allow to create versions of program from one source code to run under OS/2 and Win16. Under OS/2 program can be running under Win-OS/2 if program is Windows NE executable, and with help on Windows Libraries for OS/2, if it is OS/2 NE executable. Here is a WLO to OS/2 API mapping draft

Note minimal checked windows version is 1.03

Ordinal	Name	Description	Status	Version	ECMA-234
Real	Std	Enh
001	FATALEXIT	Display the current state of Windows and prompts for instructions on how to proceed	1.03	Yes
003	GETVERSION	Return the current version of Windows	1.03	Yes
004	LOCALINIT	Initialize local heap	Yes
005	LOCALALLOC	Allocate wBytes bytes of memory from the local heap	1.03	Yes
006	LOCALREALLOC	Reallocate the local memory block	1.03	Yes
007	LOCALFREE	Free the local memory block	1.03	Yes
008	LOCALLOCK	Lock the local memory block	1.03	Yes
009	LOCALUNLOCK	Unlock the local memory block	1.03	Yes
00a	LOCALSIZE	Retrieve the current size, in bytes, of the local memory block	1.03	Yes
00b	LOCALHANDLE	Yes
00c	LOCALFLAGS	Return information about the specified local memory block	1.03	Yes
00d	LOCALCOMPACT	Generate free bytes of memory by compacting, if necessary, the module's local heap	1.03	Yes
00e	LOCALNOTIFY
00f	GLOBALALLOC	Allocate memory from the global heap	1.03	Yes
010	GLOBALREALLOC	Reallocate the global memory block	1.03	Yes
011	GLOBALFREE	Free the global memory block	1.03	Yes
012	GLOBALLOCK	Retrieve the absolute memory address of the global memory block	1.03	Yes
013	GLOBALUNLOCK	Unlock the global memory block	1.03	Yes
014	GLOBALSIZE	Retrieve the current size, in bytes, of the global memory block	1.03	Yes
015	GLOBALHANDLE	Yes
016	GLOBALFLAGS	Return information1 about the specified global memory block	1.03	Yes
017	LOCKSEGMENT
018	UNLOCKSEGMENT
019	GLOBALCOMPACT	Generate free bytes of global memory by compacting, if necessary, the system's global heap	1.03	Yes
01d	YIELD	halts the current task and starts any waiting task	1.03	Yes
01e	WAITEVENT
024	GETCURRENTTASK	Return the handle of the currently executing task	1.03	Yes
025	GETCURRENTPDB	Return current PDB
02d	LOADMODULE	Load module	Yes
02e	FREEMODULE	Release module	Yes
02f	GETMODULEHANDLE	Retrieve the module handle of the specified module	1.03	Yes
030	GETMODULEUSAGE	Return the reference count of a given module	1.03	Yes
031	GETMODULEFILENAME	Retrieve the name of the executable file from which the specified module was loaded	1.03	Yes
032	GETPROCADDRESS	Retrieve the memory address of the function whose name	1.03	Yes
033	MAKEPROCINSTANCE	Bind the data segment of the module instance specified to the function pointed	1.03	Yes
034	FREEPROCINSTANCE	Frees the function specified from the data segment	1.03	Yes
036	GETINSTANCEDATA	Copy data from a previous instance of an application into the data area of the current instance	1.03	Yes
037	CATCH	Catch the current execution environment and copy it the the buffer	1.03	Yes
038	THROW	Restore the execution environment to the values saved in the buffer	1.03	Yes
039	GETPROFILEINT	Retrieve the value of an integer key from the the Windows initialization file	1.03
03a	GETPROFILESTRING	Copy a character string from the user profile into the buffer	1.03
03b	WRITEPROFILESTRING	Copy the character string into the Windows initialization file	1.03
03c	FINDRESOURCE	Determine the location of a resource in the specified resource file	1.03	Yes
03d	LOADRESOURCE	Load a resource from the executable file associated with the module	1.03	Yes
03e	LOCKRESOURCE	Retrieve the absolute memory address of the loaded resource	1.03	Yes
03f	FREERESOURCE	Remove a loaded resource from memory by freeing the allocated memory occupied by that resource	1.03	Yes
040	ACCESSRESOURCE	Open the specified resource file and moves the file pointer to the beginning of the specified resource	1.03
041	SIZEOFRESOURCE	Supply the size in bytes of the specified resource	1.03	Yes
042	ALLOCRESOURCE	Allocate uninitialized memory for the passed resource	1.03	Yes
043	SETRESOURCEHANDLER	Set up a function to load resources	1.03	Yes
044	INITATOMTABLE	Initialize an atom hash table and set its size	1.03
045	FINDATOM	Search the atom table for the character string	1.03
046	ADDATOM	Add the character string to the atom table	1.03
047	DELETEATOM	Delete an atom	1.03
048	GETATOMNAME	Retrieve a copy of the character string associated with atom	1.03
049	GETATOMHANDLE
04a	OPENFILE	Create, open, reopen, or delete a file	1.03	Yes
04d	AnsiNext	Move to the next character in a string	1.03
04e	AnsiPrev	Move to the previous character in a string	1.03
04f	AnsiUpper	Convert a string or a character to upper case	1.03
050	AnsiLower	Convert the given string to lower case	1.03
051	_LCLOSE	Close the file described by the file handle	Yes
052	_LREAD	Read a specified number of bytes from a file into memory	Yes
053	_LCREAT	Create and open a file, described by FileName, for reading and/or writing	Yes
054	_LLSEEK	Move the current file position pointer of the file	Yes
055	_LOPEN	Open a file	Yes
056	_LWRITE	Write a specified number of bytes of memory to a file	Yes
057	LSTRCMP	Compare two strings	Yes
058	LSTRCPY	Copy the contents from one string to another	Yes
059	LSTRCAT	Concatecate the contents of two strings	Yes
05a	LSTRLEN	Determines the length of the string	Yes
05b	INITTASK
05c	GETTEMPDRIVE	Return a letter specifying the optimal drive for a temporary file	1.03	Yes
05d	GETCODEHANDLE	Return the handle of the code segment containing the function pointed	1.03
05e	DEFINEHANDLETABLE
05f	LOADLIBRARY	Load the library module contained in the specified file and returns a handle to the loaded module	1.03	Yes
060	FREELIBRARY	Free memory occuped by library when module reference count equal to zero	1.03	Yes
061	GETTEMPFILENAME	Create a temporary filename	1.03	Yes
064	VALIDATECODESEGMENTS
066	DOS3CALL
067	NETBIOSCALL
068	GETCODEINFO
06a	SETSWAPAREASIZE
06b	SETERRORMODE
06c	SWITCHSTACKTO
06d	SWITCHSTACKBACK
06f	GLOBALWIRE
070	GLOBALUNWIRE
073	OUTPUTDEBUGSTRING
079	LOCALSHRINK	Yes
07f	GETPRIVATEPROFILEINT
080	GETPRIVATEPROFILESTRING
081	WRITEPRIVATEPROFILESTRING
082	FILECDR
083	GETDOSENVIRONMENT
084	GETWINFLAGS	Yes
086	GETWINDOWSDIRECTORY	Yes
087	GETSYSTEMDIRECTORY	Yes
088	GETDRIVETYPE	Yes
089	FATALAPPEXIT
08a	GETHEAPSPACES
096	DIRECTEDYIELD	Yes
098	GETNUMTASKS	Yes
09a	GLOBALNOTIFY	Yes
09c	LIMITEMSPAGES
0a3	GLOBALLRUOLDEST	Yes
0a4	GLOBALLRUNEWEST	Yes
0a6	WINEXEC	Yes
0a9	GETFREESPACE	Yes
0aa	ALLOCCSTODSALIAS
0ab	ALLOCDSTOCSALIAS
0af	ALLOCSELECTOR
0b0	FREESELECTOR
0b1	PRESTOCHANGOSELECTOR
0b8	GLOBALDOSALLOC
0b9	GLOBALDOSFREE
0ba	GETSELECTORBASE
0bb	SETSELECTORBASE
0bc	GETSELECTORLIMIT
0bd	SETSELECTORLIMIT
0bf	GLOBALPAGELOCK
0c0	GLOBALPAGEUNLOCK
0c4	SELECTORACCESSRIGHTS
0c5	GLOBALFIX	Yes
0c6	GLOBALUNFIX	Yes
0c7	SETHANDLECOUNT	Yes
0c8	VALIDATEFREESPACES
0cb	DEBUGBREAK
0cc	SWAPRECORDING
0ce	ALLOCSELECTORARRAY
0cf	ISDBCSLEADBYTE
136	LOCALHANDLEDELTA	Set the number of handle table entries to be allocated when the local heap manager runs out of handle table	1.03
140	ISTASK	Yes
143	ISROMMODULE
144	LOGERROR
145	LOGPARAMERROR
146	ISROMFILE
14e	ISBADREADPTR	Yes
14f	ISBADWRITEPTR	Yes
150	ISBADCODEPTR	Yes
151	ISBADSTRINGPTR	Yes
15b	ISBADHUGEWRITEPTR	Yes
15c	HMEMCPY
15d	_HREAD
15e	_HWRITE
161	LSTRCPYN
162	GETAPPCOMPATFLAGS
163	GETWINDEBUGINFO
164	SETWINDEBUGINFO

Not found in exports (check other module later): GlobalDiscard 1.03 LocalDiscard 1.03 LocalFreeze 1.03 LocalMelt 1.03 LockData 1.03 UnLockData 1.03 SetPriority 1.03 AddFontResource 1.03 RemoveFontResource 1.03 LoadBitmap 1.03 LoadCursor 1.03 LoadIcon 1.03 LoadMenu 1.03 LoadString 1.03 LoadAccelerators 1.03 AnsiToOem 1.03 OemToAnsi 1.03 MAKEINTATOM 1.03 (Macro?)

Module manager: GETVERSION GETMODULEHANDLE GETMODULEUSAGE GETMODULEFILENAME GETPROCADDRESS MAKEPROCINSTANCE FREEPROCINSTANCE GETINSTANCEDATA CATCH THROW GETCODEHANDLE LOADLIBRARY FREELIBRARY

Memory Manager: GlobalAlloc GlobalCompact GlobalDiscard GlobalFree GlobalLock GlobalReAlloc GlobalSize GlobalUnlock GlobalFlags LocalAlloc LocalCompact LocalDiscard LocalFree LocalLock LocalFreeze LocalMelt LocalReAlloc LocalSize LocalUnlock LocalHandleDelta LockData UnlockData LocalFlags

Task Scheduler: GetCurrentTask Yield SetPriority

Resource Manager: AddFontResource RemoveFontResource LoadBitmap LoadCursor LoadIcon LoadMenu LoadString LoadAccelerators FindResource LoadResource AllocResource LockResource FreeResource AccessResource SizeofResource SetResourceHandler

String Translation: AnsiUpper AnsiLower AnsiNext AnsiPrev

Atom Manager: InitAtomTable AddAtom DeleteAtom FindAtom GetAtomName

Windows Initialization File: GetProfilelnt GetProfileString WriteProfileString

Debugging: FatalExit

File I/O: OpenFile GetTempFileName GetTempDrive