lineGetAddressCaps
This 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
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 Values
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.
Note This function is for TAPI version 2.0 and later.
Requirements
OS Versions: Windows CE 1.0 and later.
Header: Tapi.h.
Link Library: Coredll.lib.
See Also
lineGetDevCaps | lineNegotiateAPIVersion
Last updated on Saturday, April 10, 2004
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