lineSetCallWaitingState
A version of this page is also available for
4/8/2010
Use the lineSetCallWaitingState function to set call waiting for a given set of media modes.
Syntax
LONG WINAPI lineSetCallWaitingState (
HLINE hLine,
DWORD dwClasses,
DWORD dwState
);
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.
- dwClasses
Indicates which line capability classes to enable or disable. See the Line Capability Classes constants for possible values.
dwState
Points to a DWORD indicating the call waiting state. Possible values are listed in the following table.Value Description LINECALLWAITING_ENABLED
Call waiting is enabled.
LINECALLWAITING_DISABLED
Call waiting is disabled.
Return Value
Returns a positive request identifier if the function is completed asynchronously, or a negative error number if an error occurs. The dwParam2 parameter of the corresponding LINE_REPLY message is zero if the function succeeds or it is a negative error number if an error occurs. The following are possible return values:
- LINEERR_INVALLINEHANDLE
- LINEERR_NOMEM
- LINEERR_OPERATIONUNAVAIL
- LINEERR_OPERATIONFAILED
- LINEERR_RESOURCEUNAVAIL
- LINEERR_INVALPOINTER
- LINEERR_INVALPARAM
- LINEERR_UNINITIALIZED
Remarks
This is a privileged function.
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 |