RDUSYS

 Function
  Read a USERS.SYS file in from disk, if present, and update the users
  record

 Syntax
  RDUSYS   No arguments are required

 Remarks
  Some DOOR applications require a USERS.SYS file to access information
  about the caller.  This statement allows you to read the USERS.SYS file
  back into memory in case any changes were made by the DOOR during the
  SHELL statement.  This statement should only be used after a SHELL
  statement that was preceeded by a WRUSYS statement.

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