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4/8/2010

This function queries the specified address on the specified line device to determine its telephony capabilities.

Syntax 

LONG TSPIAPI TSPI_lineGetAddressCaps(
  DWORD 
dwDeviceID, 
  DWORD 
dwAddressID, 
  DWORD 
dwTSPIVersion, 
  DWORD 
dwExtVersion, 
  LPLINEADDRESSCAPS 
lpAddressCaps 
);

Parameters

dwDeviceID

Line device containing the address to be queried.

dwAddressID

Address on the given line device whose capabilities are to be queried. An address identifier is permanently associated with an address; the identifier remains constant across operating system upgrades. This parameter is not validated by TAPI when this function is called.

dwTSPIVersion

Version number of the Telephony SPI to be used. The high-order word contains the major version number; the low-order word contains the minor version number.

dwExtVersion

Version number of the service-provider specific extensions to be used. This number is zero if no device-specific extensions are to be used. Otherwise, the high-order word contains the major version number; the low-order word contains the minor version number. This parameter is not validated by TAPI when this function is called.

lpAddressCaps

Pointer to a variably sized structure of type LINEADDRESSCAPS. Upon successful completion of the request, this structure is filled with address capabilities information.

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.

Value Description

LINEERR_INCOMPATIBLEAPIVERSION

The api version is incompatible.

LINEERR_NOMEM

Not enough memory is available.

LINEERR_INCOMPATIBLEEXTVERSION

The extension version is incompatible.

LINEERR_OPERATIONUNAVAIL

The operation is unavailable.

LINEERR_INVALADDRESSID

The address id is invalid.

LINEERR_OPERATIONFAILED

The operation failed.

LINEERR_NODRIVER

The driver cannot be found.

LINEERR_RESOURCEUNAVAIL

The resource is unavailable.

Remarks

The line device identifiers supported by a particular driver are numbered sequentially starting with the value of dwLineDeviceIDBasethat is passed into the TSPI_providerInitfunction.

The service provider fills in all the members of the LINEADDRESSCAPSdata structure, except for dwTotalSize, which is filled in by TAPI. The service provider must not overwrite the dwTotalSizemember.

After the service provider returns from the TSPI_ lineGetAddressCapsfunction, TAPI sets the dwCallInfoStatesand dwCallStatesmembers of the LINEADDRESSCAPSstructure as follows.

Copy Code 
LINEADDRESSCAPS.dwCallInfoStates |=
	LINECALLINFOSTATE_NUMOWNERINCR |
	LINECALLINFOSTATE_NUMOWNERDECR |
	LINECALLINFOSTATE_NUMMONITORS;
LINEADDRESSCAPS.dwCallStates |= LINECALLSTATE_UNKNOWN;

Requirements

Header tapicomn.h
Library coredll.lib
Windows Embedded CE Windows CE 3.0 and later
Windows Mobile Windows Mobile Version 5.0 and later

See Also