These routines access, modify, and obtain information about the directory structure.
Directory-Control Routines
| Routine | Use |
| _chdir, _wchdir | Change current working directory |
| _chdrive | Change current drive |
| _getcwd, _wgetcwd | Get current working directory for default drive |
| _getdcwd, _wgetdcwd | Get current working directory for specified drive |
| _getdrive | Get current (default) drive |
| _mkdir, _wmkdir | Make new directory |
| _rmdir, _wrmdir | Remove directory |
| _searchenv, _wsearchenv | Search for given file on specified paths |