lineGetCallWaitingState
A version of this page is also available for
4/8/2010
Use the lineGetCallWaitingState function to retrieve the list of media modes for which call waiting is enabled.
Syntax
LONG WINAPI lineGetCallWaitingState(
HLINE hLine,
LPDWORD lpdwClasses
);
Parameters
- hLine
The line device handle. The line device handle must have been previously obtained by a call to lineOpen with the proper TAPI device ID specified and a device-specific extension version successfully negotiated with lineNegotiateExtVersion.
- lpdwClasses
Points to a DWORD indicating which line capability classes are enabled for call waiting. See the Line Capability Classes constants for possible values.
Return Value
Returns zero if the function completes successfully, or a negative error number if an error occurs. The following are possible return values:
LINEERR_RESOURCEUNAVAIL
LINEERR_INVALLINEHANDLE
LINEERR_STRUCTURETOOSMALL
LINEERR_INVALPOINTER
LINEERR_UNINITIALIZED
LINEERR_NOMEM
LINEERR_OPERATIONUNAVAIL
LINEERR_OPERATIONFAILED.
Remarks
This function is synchronous. No LINE_REPLY message is sent. Not implemented for CDMA.
Requirements
| Header | extapi.h |
| Library | cellcore.lib |
| Windows Embedded CE | Windows CE 3.0 and later |
| Windows Mobile | Pocket PC 2002 and later, Smartphone 2002 and later |