GetWDInfo
GetWDInfo Query information about an existing working directory
#include <Files.h> File Manager (PBxxx)
OSErr GetWDInfo(wdRefNum, vRefNum, dirID, procID );
short wdRefNum; working directory to query
short * vRefNum; ref num of working directory's volume
long *dirID; directory ID of working directory
long *procID; if != 0, index specific working directories
returns Error Code; 0=no error
GetWDInfo obtains the "hard" directory ID and the real volume number
associated with a working directory.
Returns: an operating system Error Code. It will be one of:
noErr (0) No error
nsvErr (-35) No such volume