U_PWDHIST(IEXP) (STRING)

 Function
  Get the last three passwords used by the current user.

 Syntax
  U_PWDHIST(num)

   num = The number of the password from the history to return (1 through 3).

 Return Type & Value
  STRING
  Returns the specified password from the history (1 for the most recent,
  3 for the least recent).

 Remarks
  PCBoard has the ability to track the last three passwords used by each
  user.  This function will return one of those passwords from the history
  for the user currently online.  Unlike the predefined U_... user
  variables, this function does not require the use of GETUSER to return
  valid information.  However, it does require that the password PSA has
  been installed to return meaningful information.  The existence of the
  password PSA may be checked via the PSA() function.

 Examples
  INTEGER i
  IF (PSA(4)) THEN
    FOR i = 1 TO 3
      PRINTLN "Password history ",i,":  ",U_PWDHIST(i)
    NEXT
  ENDIF