TSPI_lineNegotiateTSPIVersion

A version of this page is also available for

Windows Embedded CE 6.0 R3

4/8/2010

This function returns the highest SPI version the service provider can operate under for this device, given the range of possible SPI versions.

Syntax

LONG TSPIAPI TSPI_lineNegotiateTSPIVersion(
  DWORD dwDeviceID, 
  DWORD dwLowVersion, 
  DWORD dwHighVersion, 
  LPDWORD lpdwTSPIVersion 
);

Parameters

• dwDeviceID
  Line device for which interface version negotiation is to be performed. In addition to device identifiers within the range the service provider supports, this may be the valueINITIALIZE_NEGOTIATION. This value is used to signify that an overall interface version is to be negotiated.

• dwLowVersion
  Lowest TSPI version number under which TAPI can operate. The most-significant WORD is the major version number and the least-significant WORD is the minor version number.

• dwHighVersion
  Highest TSPI version number under which TAPI can operate. The most-significant WORD is the major version number and the least-significant WORD is the minor version number.

• lpdwTSPIVersion
  Pointer to a DWORD. The service provider fills this location with the highest TSPI version number, within the range requested by the caller, under which the service provider can operate. The most-significant WORD is the major version number and the least-significant WORD is the minor version number. If the requested range does not overlap the range supported by the service provider, the function returns LINEERR_INCOMPATIBLEAPIVERSION.

Return Value

Returns zero if the function succeeds, or an error number if an error occurs. The following table shows the return values for this function.

Remarks

When dwDeviceID is INITIALIZE_NEGOTIATION, this function must not return LINEERR_OPERATIONUNAVAIL, because this function (with that value) is mandatory for negotiating the overall interface version even if the service provider supports no line devices.

Requirements

See Also

Reference

TSPI_lineGetExtensionID
TSPI_lineNegotiateExtVersion
TSPI_providerInit