lineGetAddressCaps

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

LONG WINAPI lineGetAddressCaps(
  HLINEAPP hLineApp,               
  DWORD dwDeviceID,                
  DWORD dwAddressID,               
  DWORD dwAPIVersion,              
  DWORD dwExtVersion,              
  LPLINEADDRESSCAPS lpAddressCaps  
);

Parameters

hLineApp

The handle to the application's registration with TAPI.

dwDeviceID

The line device containing the address to be queried.

dwAddressID

The 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.

dwAPIVersion

The version number of the Telephony API to be used. The high-order word contains the major version number; the low-order word contains the minor version number. This number is obtained by lineNegotiateAPIVersion.

dwExtVersion

The version number of the service provider-specific extensions to be used. This number can be set to zero if no device-specific extensions are to be used. Otherwise, the high-order word contains the major version number; and the low-order word contains the minor version number.

lpAddressCaps

A pointer to a variably sized structure of type LINEADDRESSCAPS. Upon successful completion of the request, this structure is filled with address capabilities information. Prior to calling lineGetAddressCaps, the application should set the dwTotalSize member of this structure to indicate the amount of memory available to TAPI for returning information.

Return Values

Returns zero if the request succeeds or a negative error number if an error occurs. Possible return values are:

LINEERR_BADDEVICEID, LINEERR_NOMEM, LINEERR_INCOMPATIBLEAPIVERSION, LINEERR_OPERATIONFAILED, LINEERR_INCOMPATIBLEEXTVERSION, LINEERR_RESOURCEUNAVAIL, LINEERR_INVALADDRESSID, LINEERR_STRUCTURETOOSMALL, LINEERR_INVALAPPHANDLE, LINEERR_UNINITIALIZED, LINEERR_INVALPOINTER, LINEERR_OPERATIONUNAVAIL, LINEERR_NODRIVER, LINEERR_NODEVICE.

Remarks

Valid address identifiers range from zero to one less than the number of addresses returned by lineGetDevCaps. The version number to be supplied is the version number that was returned as part of the line's device capabilities by lineGetDevCaps.

Requirements

  Windows NT/2000: Requires Windows NT 4.0 SP3 or later.
  Windows 95/98: Requires Windows 95 or later.
  Version: Requires TAPI 1.3 or later.
  Header: Declared in Tapi.h.
  Library: Use Tapi32.lib.
  Unicode: Implemented as Unicode and ANSI versions on all platforms.

See Also

TAPI 2.2 Reference Overview, Basic Telephony Services Reference, LINEADDRESSCAPS, lineGetDevCaps, lineNegotiateAPIVersion