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      • ▼Telephony Application Programming Interface (TAPI)
        • ▼TAPI Version 2.1
          • Legal Information
          • ▼Using the TAPI 2.1 Programmer's Reference
            • Document Overview
            • ▶TAPI Versions
            • What's New for TAPI Version 2.1
            • TAPI Functions, API DLL Hooks, and Structures New for Version 2.1
            • Features in TAPI Version 2.0 and Later
            • TAPI Functions, Messages, Structures, and Constants for Version 2.0
            • Document Conventions for TAPI 2.1 Programmer's Reference
            • Related Documentation on Telephony Services
          • ▶Overviews
          • ▶TAPI Reference
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        • ▶TSPI Version 2.1
        • ▶TAPI Version 3.0
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