lineSetCallWaitingState

A version of this page is also available for

Windows Embedded CE 6.0 R3

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

See Also

Reference

Extended TAPI Functions
Barring Modes