FUNCTION FIELDPOSX()

  Short:
  ------
  FIELDPOSX() Returns position of field named in expression

  Returns:
  --------
  <nPosition> => natuaral position of field (0 if not found)

  Syntax:
  -------
  FIELDPOSX(cField)

  Description:
  ------------
  <cField> is an expression containing the name of a  field. Can
  also include the alias.

  Examples:
  ---------
   ?FIELDPOSX("CUSTOMER->LNAME")
   ?FIELDPOSX("LNAME")

  Notes:
  -------
  FIELDPOS() (a Clipper function) works with field
  names, but will not allow the ALIAS.

  Source:
  -------
  S_FIELDS.PRG