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PP_CHKPP()
Verify the integrity of the control file
------------------------------------------------------------------------------

Syntax
  PP_CHKPP()  .  lStatus

Returns
  .T. if successful, else .F.

Description
  Checks the validity of the control file.  It is possible, however,
  for this function to return a .T. for "file okay" when the data is
  garbaged.  This function call should be placed at the beginning
  of your application, if even desired at all.

  NOTE:  All functions in the PROTECTION PLUS library that
  depend on the control file call PP_CHKPP() to verify that
  control file is sound.  If this function returns a false, the
  function called will return either the "worst case" value or an
  error value.  For example, if PP_EXPIRED() is run and
  PP_CHKPP() failed during the execution, PP_EXPIRED() will
  return .T., to keep the program from running.

Example

if !pp_chkpp()
    ?? "Error with application datafile"
    ?
    cancel
endif