WRUSYS

 Function
  Write (create) a USERS.SYS file out to a disk, which can be used by a
  SHELLed application.

 Syntax
  WRUSYS   No arguments are required

 Remarks
  Some DOOR applications require a USERS.SYS file to access information
  about the caller.  This statement allows you to create that file prior
  to running an application via SHELL.  Should the DOOR make changes to
  the USERS.SYS file, you should use RDUSYS after the SHELL to read the
  changes back into memory.  It should be noted that it is not possible
  to create the USERS.SYS file with a TPA record with this statement.

 Examples
  INTEGER ret
  WRUSYS
  SHELL FALSE,ret,"MYAPP.EXE",""
  RDUSYS