Append a blank record to a DBF file. It is also locked.
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 Syntax

        GT_Append([<nTimeout>],[<nPause>]) -> lSuccess

 Arguments:

 Returns:

      lSuccess

 Description:

      Append a blank record to a DBF file. It is also locked.

 Examples:

      // Add new, default waiting values
      IF .NOT. GT_Append()
          ? 'Error'
      ENDIF

 Source: GT_APPEN.PRG

 Author:  Martin Bryant