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 AX_Driver()
 Verify an Advantage RDD is loaded
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 Syntax

     AX_Driver() -> logical

 Returns

     Returns a .T. if an Advantage RDD is loaded in the current work area.
     Returns an .F. if any other RDD is loaded in the current work area.

 Description

     AX_Driver() determines if an Advantage RDD is being used in the
     current work area.  This allows alternate code paths to be taken
     depending on whether an Advantage RDD or a non-Advantage RDD is
     being used in the current work area.

 Example

     // Need to include an Advantage header file to use AUTOUSE command
     #include "DBFNTXAX.CH"

     AUTOUSE cust VIA "DBFNTXAX" ALTERNATE "DBFNTX"     // Open CUST.DBF

     // Check to verify an Advantage RDD is being used
     IF ( AX_Driver() )
        ? "Advantage RDD is being used in the current work area."
     ELSE
        ? "Advantage RDD is not being used in the current work area."
     ENDIF

     // Should print "Advantage RDD is being used..." if cust.dbf exists
     // on a server where the Advantage Database Server is running.