lineGetAddressCaps (Compact 2013)

3/26/2014

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

Syntax

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

Parameters

• hLineApp
  Handle to the application's registration with TAPI.

• 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.

• dwAPIVersion
  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 using the lineNegotiateAPIVersion function.

• dwExtVersion
  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
  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 Value

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

Value	Description
LINEERR_BADDEVICEID	The deviceidentifier is incorrect.
LINEERR_NOMEM	Not enough memory is available.
LINEERR_INCOMPATIBLEAPIVERSION	The telephony API version is incompatible.
LINEERR_OPERATIONFAILED	The operation failed.
LINEERR_INCOMPATIBLEEXTVERSION	The extension version is incompatible.
LINEERR_RESOURCEUNAVAIL	The resources are unavailable.
LINEERR_INVALADDRESSID	The address identifier is invalid.
LINEERR_STRUCTURETOOSMALL	The structure is too small.
LINEERR_INVALAPPHANDLE	The handle to the applications registration with TAPI is invalid.
LINEERR_UNINITIALIZED	A parameter is uninitialized.
LINEERR_INVALPOINTER	The pointer is invalid.
LINEERR_OPERATIONUNAVAIL	The operation is unavailable.
LINEERR_NODRIVER	The driver was not found.
LINEERR_NODEVICE	The device was not found.

Remarks

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

Requirements

Header	tapi.h
Library	TAPI32.dll

See Also

Reference

TAPI Line Device Functions
lineGetDevCaps
lineNegotiateAPIVersion