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LINEEXTENSIONID structure (tapi.h)

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The LINEEXTENSIONID structure describes an extension identifier. Extension identifiers are used to identify service provider-specific extensions for line devices. Multiple functions use this structure, including the lineNegotiateAPIVersion function and the TSPI_lineGetExtensionID function.

Syntax

typedef struct lineextensionid_tag {
  DWORD dwExtensionID0;
  DWORD dwExtensionID1;
  DWORD dwExtensionID2;
  DWORD dwExtensionID3;
} LINEEXTENSIONID, *LPLINEEXTENSIONID;

Members

dwExtensionID0

First part of the extension identifier.

dwExtensionID1

Second part of the extension identifier.

dwExtensionID2

Third part of the extension identifier.

dwExtensionID3

Fourth part of the extension identifier.

Remarks

These four members together specify a universally unique extension identifier that identifies a line device class extension. This structure may not be extended.

Extension identifiers are generated using an SDK-provided generation utility.

Requirements

Requirement Value
Header tapi.h

See also

TSPI_lineGetExtensionID

lineNegotiateAPIVersion