Edit C:\Windows\Inf\TAPISRV\perfctr.h

//
//    Copyright (C) Microsoft.  All rights reserved.
//
//
//  Offset definition file for extensible counter objects and counters
//
//  These "relative" offsets must start at 0 and be multiples of 2 (i.e.
//  even numbers). In the Open Procedure, they will be added to the 
//  "First Counter" and "First Help" values for the device they belong to, 
//  in order to determine the absolute location of the counter and 
//  object names and corresponding Explain text in the registry.
//
//  This file is used by the extensible counter DLL code as well as the 
//  counter name and Explain text definition file (.INI) file that is used
//  by LODCTR to load the names into the registry.
//
#define TAPIOBJ                 0
#define LINES                   2
#define PHONES                  4
#define LINESINUSE              6
#define PHONESINUSE             8
#define TOTALOUTGOINGCALLS      10
#define TOTALINCOMINGCALLS      12
#define CLIENTAPPS              14
#define ACTIVEOUTGOINGCALLS     16
#define ACTIVEINCOMINGCALLS     18

Ms-Dos/Windows Unix Write backup

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