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

For file-system drivers, the case of the current directory is set by pszDir, and not by the case of the directories on the disk. For example, if the directory "c:\bin" is created, and a pszDir value of "c:\bin," is specified, the current directory returned by DosQueryCurrentDir will be "c:\bin."

Programs running without the NEWFILES bit can set the current directory to a non-8.3 file-name format.

An application must issue DosQuerySysInfo to determine the maximum path length that the operating system supports. The returned value should be used to dynamically allocate buffers that are to be used to store paths.