Pos                      Returns Position of Substring within String

 Pos(Sub,Source : <string>) : Integer;                                   [TP]

    Returns the starting location of the substring Sub within the string
    Source. If Sub is not found in Source, the returned value is 0.

      Sub,Source    Any string value (constant, variable, function call or
                    expression).

           Note:    Note that Sub can be a string of length 1 (i.e., a
                    character).

  -------------------------------- Example ---------------------------------

           Name := 'Rufus P. Jones';
           I := Pos('us',Name);     { I gets assigned 4 }