S_DN

 Function
  Set the share deny none flag in a FCREATE/FOPEN/FAPPEND statement.

 Value
  0 = 0b = 0o = 0h

 Remarks
  DOS 3.1 or later (which is what is required by PCBoard) allows processes
  to decide what mode of file sharing should be allowed.  This constant
  allows you to specify that other processes may open the same file for
  read or write access from the time you open the file to the time you
  close the file. This is useful when you don't need exclusive access to
  a file for any reason and need not restrict other processes.

 Example

  FOPEN 1,"FILE.DAT",O_RD,S_DN ' Do not deny other processes any access
  FOR i = 1 TO 10
   FGET 1,s
   PRINTLN s
  NEXT
  FCLOSE 1 ' Close the file and allow others to open it in any mode