STRPULL()

  Short:
  ------
  STRPULL() Extract text between 2 characters in a string

  Returns:
  --------
  <cExtract> => text extracted

  Syntax:
  -------
  STRPULL(cSource,cDelim1,cDelim2)

  Description:
  ------------
  Extracts text from <cSource> between characters
  <cDelim1> and <cDelim2>.

  If <cDelim1> is empty, uses beginning of <cSource>.

  If <cDelim2> is empty, uses end of <cSource>.

  Examples:
  ---------
   cString := "SUPERFUNCTION"

   cString := STRPULL(cString,'E','C')

   // (returns "RFUN")

  Source:
  -------
  S_STRPUL.PRG