This is part of Family API which allow to create dual-os version of program runs under OS/2 and DOS

Note: This is legacy API call. It is recommended to use 32-bit equivalent

DosQHandType

This call determines whether a handle references a file or a device.

Syntax

DosQHandType (FileHandle, HandType, FlagWord)

Parameters

FileHandle (HFILE) - input : File handle.

HandType (PUSHORT) - output : Address of the value indicating the handle type. HandType is composed of two bytes:

15 - Network bit:

0 = The handle refers to a local file, device, or pipe.

1 = Means that the handle refers to a remote file, device, or pipe.

14-8 - Reserved.

7-0 - HandleClass describes the handle class. It may take on the following values in the low byte of HandleType:

0 - Handle is for a disk file

1 - Handle is for a character device

2 - Handle is for a pipe.

Values greater than 2 are reserved.

FlagWord (PUSHORT) - output : Address of the device driver's attribute word if HandleType indicates a local character device.

Return Code

rc (USHORT) - return

Return code descriptions are:

0 NO_ERROR

6 ERROR_INVALID_HANDLE

Remarks

This function allows programs that are interactive or file-oriented to determine the source of their input. For example, CMD.EXE suppresses writing prompts if the input is from a disk file.

Bindings

C

#define INCL_DOSFILEMGR USHORT rc = DosQHandType(FileHandle, HandType, FlagWord); HFILE FileHandle; /* File handle */ PUSHORT HandType; /* Handle type (returned) */ PUSHORT FlagWord; /* Device driver attribute (returned) */ USHORT rc; /* return code */

MASM

EXTRN DosQHandType:FAR INCL_DOSFILEMGR EQU 1 PUSH WORD FileHandle ;File handle PUSH@ WORD HandType ;Handle type (returned) PUSH@ WORD FlagWord ;Device driver attribute (returned) CALL DosQHandType Returns WORD
Family API
DOS	Process Manager	DosBeep DosExit DosSleep DosExecPgm
File Manager	DosChDir DosChgFilePtr DosClose DosDelete DosDupHandle DosMkDir DosMove DosQCurDir DosQCurDisk DosSetFileMode DosOpen DosQFileInfo DosRead DosQFileMode DosQFSInfo DosQVerify DosRmDir DosSelectDisk DosFindClose DosFindFirst DosFindNext DosSetFileInfo DosSetVerify DosWrite DosFileLocks DosSetFHandState DosNewSize DosBufReset DosQFHandState DosSetFSinfo DosShutdown
Memory Manager	DosFreeSeg DosSubAlloc DosSubFree DosSubSet DosAllocHuge DosAllocSeg DosReallocHuge DosReallocSeg DosGetHugeShift DosCreateCSAlias
NLS	DosCaseMap DosGetCtryInfo DosGetDBCSEv DosSetCtryCode DosGetCollate DosGetMessage DosInsMessage DosPutMessage
Date and Time	DosSetDateTime DosGetDateTime
Devices	DosDevConfig DosDevIOCtl DosDevIOCtl2
Signals	DosHoldSignal DosSetSigHandler
Misc	BadDynLink DosGetEnv DosGetMachineMode DosGetVersion DosError DosErrClass DosSetVec
KBD	KbdCharIn KbdFlushBuffer KbdGetStatus KbdSetStatus KbdStringIn KbdPeek
VIO	VioGetBuf VioGetConfig VioGetCurPos VioGetCurType VioGetPhysBuf VioReadCellStr VioReadCharStr VioScrollUp VioScrollDn VioScrollLf VioScrollRt VioScrUnLock VioSetCurPos VioSetCurType VioSetMode VioGetMode VioShowBuf VioWrtCellStr VioWrtCharStr VioWrtCharStrAtt VioWrtNAttr VioWrtNCell VioWrtNChar VioWrtTTY VioScrLock VioPopUp
Tools	BIND
Modules	DOSCALLS.DLL VIOCALLS.DLL KBDCALLS.DLL MSG.DLL
Libraries	API.LIB OS2386.LIB FAPI.LIB DOSCALLS.LIB SUBCALLS.LIB