DosChDir

This call defines the current directory for the requesting process.

Syntax
DosChDir (DirName, Reserved)

Parameters

 * DirName (PSZ) - input : Address of the ASCIIZ directory path name.
 * Reserved (ULONG) - input : Reserved and must be set to zero.

Return Code

 * rc (USHORT) - return:Return code descriptions are:
 * 0 NO_ERROR
 * 2 ERROR_FILE_NOT_FOUND
 * 3 ERROR_PATH_NOT_FOUND
 * 5 ERROR_ACCESS_DENIED
 * 8 ERROR_NOT_ENOUGH_MEMORY
 * 26 ERROR_NOT_DOS_DISK
 * 87 ERROR_INVALID_PARAMETER
 * 108 ERROR_DRIVE_LOCKED
 * 206 ERROR_FILENAME_EXCED_RANGE

Remarks
The directory path is not changed if any member of the path does not exist. The current directory changes only for the requesting process.

For FSDs, the case of the current directory is set according to the DirName passed in, not according to the case of the directories on disk. For example, if the directory "c:\bin" is created and DosChDir is called with DirName "c:\bin", the current directory returned by DosQCurDir will be "c:\bin".

Programs running without the NEWFILES bit set are allowed to DosChDir to a non-8.3 filename format directory.

DosQSysInfo must be used by an application to determine the maximum path length supported by OS/2. The returned value should be used to dynamically allocate buffers that are to be used to store paths.

C

 * 1) define INCL_DOSFILEMGR

USHORT rc = DosChDir(DirName, Reserved);

PSZ    DirName;       /* Directory path name * ULONG  0;             /* Reserved (must be zero) */

USHORT rc;            /* return code */ 

MASM
 EXTRN DosChDir:FAR INCL_DOSFILEMGR    EQU 1

PUSH@ ASCIIZ  DirName     ;Directory path name string PUSH  DWORD   0           ;Reserved (must be zero) CALL  DosChDir

Returns WORD 

Example Code
This example changes directories to \os2\system. 
 * 1) define INCL_DOSFILEMGR


 * 1) define PATH "\\os2\\system"
 * 2) define RESERVED 0L

USHORT rc;

rc = DosChDir(PATH, RESERVED); 