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

Ordinal	Name	Description	Status	Version
000	USER
001	MESSAGEBOX
002	OLDEXITWINDOWS	Done
005	INITAPP
006	POSTQUITMESSAGE
007	EXITWINDOWS
00a	SETTIMER
00b	BEAR11
00c	KILLTIMER
00d	GETTICKCOUNT	Done
00e	GETTIMERRESOLUTION
00f	GETCURRENTTIME	Done
010	CLIPCURSOR
011	GETCURSORPOS
012	SETCAPTURE
013	RELEASECAPTURE
014	SETDOUBLECLICKTIME
015	GETDOUBLECLICKTIME
016	SETFOCUS
017	GETFOCUS
018	REMOVEPROP
019	GETPROP
01a	SETPROP
01b	ENUMPROPS
01c	CLIENTTOSCREEN
01d	SCREENTOCLIENT
01e	WINDOWFROMPOINT
01f	ISICONIC
020	GETWINDOWRECT
021	GETCLIENTRECT
022	ENABLEWINDOW
023	ISWINDOWENABLED
024	GETWINDOWTEXT	Done
025	SETWINDOWTEXT	Done
026	GETWINDOWTEXTLENGTH	Done
027	BEGINPAINT
028	ENDPAINT
029	CREATEWINDOW	Done
02a	SHOWWINDOW
02b	CLOSEWINDOW
02c	OPENICON
02d	BRINGWINDOWTOTOP
02e	GETPARENT
02f	ISWINDOW
030	ISCHILD
031	ISWINDOWVISIBLE
032	FINDWINDOW
034	ANYPOPUP
035	DESTROYWINDOW
036	ENUMWINDOWS
037	ENUMCHILDWINDOWS
038	MOVEWINDOW
039	REGISTERCLASS	Done
03a	GETCLASSNAME
03b	SETACTIVEWINDOW
03c	GETACTIVEWINDOW
03d	SCROLLWINDOW
03e	SETSCROLLPOS
03f	GETSCROLLPOS
040	SETSCROLLRANGE
041	GETSCROLLRANGE
042	GETDC
043	GETWINDOWDC
044	RELEASEDC
045	SETCURSOR
046	SETCURSORPOS
047	SHOWCURSOR
048	SETRECT	Done
049	SETRECTEMPTY	Done
04a	COPYRECT	Done
04b	ISRECTEMPTY	Done
04c	PTINRECT	Done
04d	OFFSETRECT	Done
04e	INFLATERECT	Done
04f	INTERSECTRECT	Done
050	UNIONRECT	Done
051	FILLRECT	Done
052	INVERTRECT	Done
053	FRAMERECT	Done
054	DRAWICON	Done
055	DRAWTEXT	Done
056	BEAR86
057	DIALOGBOX	Done
058	ENDDIALOG
059	CREATEDIALOG	Done
05a	ISDIALOGMESSAGE
05b	GETDLGITEM
05c	SETDLGITEMTEXT	Done
05d	GETDLGITEMTEXT	Done
05e	SETDLGITEMINT
05f	GETDLGITEMINT
060	CHECKRADIOBUTTON
061	CHECKDLGBUTTON	Done
062	ISDLGBUTTONCHECKED	Done
063	DLGDIRSELECT	Done
064	DLGDIRLIST
065	SENDDLGITEMMESSAGE	Done
066	ADJUSTWINDOWRECT
067	MAPDIALOGRECT
068	MESSAGEBEEP
069	FLASHWINDOW
06a	GETKEYSTATE
06b	DEFWINDOWPROC
06c	GETMESSAGE
06d	PEEKMESSAGE
06e	POSTMESSAGE
06f	SENDMESSAGE
070	WAITMESSAGE
071	TRANSLATEMESSAGE
072	DISPATCHMESSAGE
073	REPLYMESSAGE
074	POSTAPPMESSAGE
076	REGISTERWINDOWMESSAGE
077	GETMESSAGEPOS
078	GETMESSAGETIME
079	SETWINDOWSHOOK	Done
07a	CALLWINDOWPROC
07b	CALLMSGFILTER
07c	UPDATEWINDOW	Done
07d	INVALIDATERECT	Done
07e	INVALIDATERGN	Done
07f	VALIDATERECT	Done
080	VALIDATERGN	Done
081	GETCLASSWORD
082	SETCLASSWORD
083	GETCLASSLONG
084	SETCLASSLONG
085	GETWINDOWWORD
086	SETWINDOWWORD
087	GETWINDOWLONG
088	SETWINDOWLONG
089	OPENCLIPBOARD
08a	CLOSECLIPBOARD
08b	EMPTYCLIPBOARD
08c	GETCLIPBOARDOWNER
08d	SETCLIPBOARDDATA
08e	GETCLIPBOARDDATA
08f	COUNTCLIPBOARDFORMATS
090	ENUMCLIPBOARDFORMATS
091	REGISTERCLIPBOARDFORMAT
092	GETCLIPBOARDFORMATNAME
093	SETCLIPBOARDVIEWER
094	GETCLIPBOARDVIEWER
095	CHANGECLIPBOARDCHAIN
096	LOADMENU	Done
097	CREATEMENU	Done
098	DESTROYMENU	Done
099	CHANGEMENU	Done
09a	CHECKMENUITEM	Done
09b	ENABLEMENUITEM	Done
09c	GETSYSTEMMENU	Done
09d	GETMENU	Done
09e	SETMENU	Done
09f	GETSUBMENU	Done
0a0	DRAWMENUBAR	Done
0a1	GETMENUSTRING	Done
0a2	HILITEMENUITEM	Done
0a3	CREATECARET	Done
0a4	DESTROYCARET	Done
0a5	SETCARETPOS	Done
0a6	HIDECARET	Done
0a7	SHOWCARET	Done
0a8	SETCARETBLINKTIME	Done
0a9	GETCARETBLINKTIME	Done
0aa	ARRANGEICONICWINDOWS
0ab	WINHELP
0ad	LOADCURSOR
0ae	LOADICON
0af	LOADBITMAP
0b0	LOADSTRING	Done
0b1	LOADACCELERATORS	Done
0b2	TRANSLATEACCELERATOR
0b3	GETSYSTEMMETRICS	Done
0b4	GETSYSCOLOR	Done
0b5	SETSYSCOLORS	Done
0b6	BEAR182
0b7	GETCARETPOS	Done
0b8	QUERYSENDMESSAGE
0b9	GRAYSTRING	Done
0ba	SWAPMOUSEBUTTON
0bc	SETSYSMODALWINDOW
0bd	GETSYSMODALWINDOW
0be	GETUPDATERECT
0bf	CHILDWINDOWFROMPOINT
0c0	INSENDMESSAGE
0c1	ISCLIPBOARDFORMATAVAILABLE
0c2	DLGDIRSELECTCOMBOBOX	Done
0c3	DLGDIRLISTCOMBOBOX
0c4	TABBEDTEXTOUT
0c5	GETTABBEDTEXTEXTENT
0c6	CASCADECHILDWINDOWS
0c7	TILECHILDWINDOWS
0c8	OPENCOMM	Stub
0c9	SETCOMMSTATE	Stub
0ca	GETCOMMSTATE	Stub
0cb	GETCOMMERROR	Stub
0cc	READCOMM	Stub
0cd	WRITECOMM	Stub
0ce	TRANSMITCOMMCHAR	Stub
0cf	CLOSECOMM	Stub
0d0	SETCOMMEVENTMASK	Stub
0d1	GETCOMMEVENTMASK	Stub
0d2	SETCOMMBREAK	Stub
0d3	CLEARCOMMBREAK	Stub
0d4	UNGETCOMMCHAR	Stub
0d5	BUILDCOMMDCB	Stub
0d6	ESCAPECOMMFUNCTION	Stub
0d7	FLUSHCOMM	Stub
0d8	UserSeeUserDo	Done
0da	DIALOGBOXINDIRECT	Done
0db	CREATEDIALOGINDIRECT	Done
0dc	LOADMENUINDIRECT	Done
0dd	SCROLLDC
0de	GETKEYBOARDSTATE
0df	SETKEYBOARDSTATE
0e0	GETWINDOWTASK
0e1	ENUMTASKWINDOWS
0e2	LOCKINPUT
0e3	GETNEXTDLGGROUPITEM
0e4	GETNEXTDLGTABITEM
0e5	GETTOPWINDOW
0e6	GETNEXTWINDOW
0e7	GETSYSTEMDEBUGSTATE
0e8	SETWINDOWPOS
0e9	SETPARENT
0ea	UNHOOKWINDOWSHOOK
0eb	DEFHOOKPROC	Done
0ec	GETCAPTURE
0ed	GETUPDATERGN
0ee	EXCLUDEUPDATERGN
0ef	DIALOGBOXPARAM
0f0	DIALOGBOXINDIRECTPARAM
0f1	CREATEDIALOGPARAM	Done
0f2	CREATEDIALOGINDIRECTPARAM
0f3	GETDIALOGBASEUNITS
0f4	EQUALRECT	Done
0f5	ENABLECOMMNOTIFICATION	Stub
0f6	EXITWINDOWSEXEC
0f7	GETCURSOR
0f8	GETOPENCLIPBOARDWINDOW
0f9	GETASYNCKEYSTATE
0fa	GETMENUSTATE	Done
0fb	SENDDRIVERMESSAGE
0fc	OPENDRIVER
0fd	CLOSEDRIVER
0fe	GETDRIVERMODULEHANDLE
0ff	DEFDRIVERPROC
100	GETDRIVERINFO
101	GETNEXTDRIVER
102	MAPWINDOWPOINTS
103	BEGINDEFERWINDOWPOS
104	DEFERWINDOWPOS
105	ENDDEFERWINDOWPOS
106	GETWINDOW
107	GETMENUITEMCOUNT	Done
108	GETMENUITEMID	Done
109	SHOWOWNEDPOPUPS
10a	SETMESSAGEQUEUE
10b	SHOWSCROLLBAR
10c	GLOBALADDATOM	Done
10d	GLOBALDELETEATOM	Done
10e	GLOBALFINDATOM	Done
10f	GLOBALGETATOMNAME	Done
110	ISZOOMED
115	GETDLGCTRLID
116	GETDESKTOPHWND
117	OldSetDeskPattern	Done
11a	SELECTPALETTE
11b	REALIZEPALETTE
11c	GETFREESYSTEMRESOURCES	Done
11e	GETDESKTOPWINDOW
11f	GETLASTACTIVEPOPUP
120	GETMESSAGEEXTRAINFO
122	REDRAWWINDOW
123	SETWINDOWSHOOKEX
124	UNHOOKWINDOWSHOOKEX
125	CALLNEXTHOOKEX
126	LOCKWINDOWUPDATE
12b	mouse_event	Done
134	DEFDLGPROC
135	GETCLIPCURSOR
13f	SCROLLWINDOWEX
144	FillWindow	Done
145	PaintRect	Done
146	GetControlBrush	Done
14b	ENABLEHARDWAREINPUT
14d	IsUserIdle	Done
14e	GETQUEUESTATUS
14f	GETINPUTSTATE
151	GetMouseEventProc	Done
166	ISMENU
167	GETDCEX
170	COPYICON	Done
171	COPYCURSOR	Done
172	GETWINDOWPLACEMENT
173	SETWINDOWPLACEMENT
175	SUBTRACTRECT	Done
18d	REGISTERCLASSEX	Done
18e	GetClassInfoEx	Done
192	GETPRIORITYCLIPBOARDFORMAT
193	UNREGISTERCLASS	Done
194	GETCLASSINFO	Done
196	CREATECURSOR	Done
197	CREATEICON	Done
198	CreateCursorIconIndirect	Done
19a	INSERTMENU	Done
19b	APPENDMENU	Done
19c	REMOVEMENU	Done
19d	DELETEMENU	Done
19e	MODIFYMENU	Done
19f	CREATEPOPUPMENU	Done
1a0	TRACKPOPUPMENU	Done
1a1	GETMENUCHECKMARKDIMENSIONS	Done
1a2	SETMENUITEMBITMAPS	Done
1a4	_WSPRINTF	Done
1a5	WVSPRINTF	Done
1a6	DLGDIRSELECTEX
1a7	DLGDIRSELECTCOMBOBOXEX
1ae	LSTRCMP	Done
1af	ANSIUPPER	Done
1b0	ANSILOWER	Done
1b1	ISCHARALPHA	Done
1b2	ISCHARALPHANUMERIC	Done
1b3	ISCHARUPPER	Done
1b4	ISCHARLOWER	Done
1b5	ANSIUPPERBUFF	Done
1b6	ANSILOWERBUFF	Done
1bd	DEFFRAMEPROC
1bf	DEFMDICHILDPROC
1c3	TRANSLATEMDISYSACCEL
1c4	CREATEWINDOWEX
1c6	ADJUSTWINDOWRECTEX
1c9	DESTROYICON	Done
1ca	DESTROYCURSOR	Done
1ce	CALCCHILDSCROLL
1d2	DRAWFOCUSRECT	Done
1d7	LSTRCMPI	Done
1d8	ANSINEXT	Done
1d9	ANSIPREV	Done
1e2	ENABLESCROLLBAR
1e3	SYSTEMPARAMETERSINFO	Done
1f3	WNETERRORTEXT	Stub
1f5	WNETOPENJOB	Stub
1f6	WNETCLOSEJOB	Stub
1f7	WNETABORTJOB	Stub
1f8	WNETHOLDJOB	Stub
1f9	WNETRELEASEJOB	Stub
1fa	WNETCANCELJOB	Stub
1fb	WNETSETJOBCOPIES	Stub
1fc	WNETWATCHQUEUE	Stub
1fd	WNETUNWATCHQUEUE	Stub
1fe	WNETLOCKQUEUEDATA	Stub
1ff	WNETUNLOCKQUEUEDATA	Stub
200	WNETGETCONNECTION
201	WNETGETCAPS	Done
202	WNETDEVICEMODE	Stub
203	WNETBROWSEDIALOG	Stub
204	WNETGETUSER
205	WNETADDCONNECTION	Stub
206	WNETCANCELCONNECTION	Stub
207	WNETGETERROR	Stub
208	WNETGETERRORTEXT	Stub
209	WNETENABLE
20a	WNETDISABLE
20b	WNETRESTORECONNECTION	Stub
20c	WNETWRITEJOB	Stub
20d	WNETCONNECTDIALOG	Stub
20e	WNETDISCONNECTDIALOG	Stub
20f	WNETCONNECTIONDIALOG	Stub
210	WNETVIEWQUEUEDIALOG	Stub
211	WNETPROPERTYDIALOG	Stub
212	WNETGETDIRECTORYTYPE
213	WNETDIRECTORYNOTIFY	Stub
214	WNETGETPROPERTYTEXT	Stub