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Use the lineGetCallBarringStatefunction to retrieve the current barring state for a given mode.
LONG WINAPI lineGetCallBarringState( HLINE hLine, DWORD dwMode, LPDWORD lpdwClasses, LPCTSTR lpszPassword );
The line device handle. The line device handle must have been previously obtained by a call to lineOpenwith the proper TAPI device ID specified and a device-specific extension version successfully negotiated with lineNegotiateExtVersion.
Indicates which barring mode the application needs status on.
Points to a bit field DWORD indicating which media modes are currently barred. See the Barring Modesconstants for possible values.
A password may be necessary to read the current barring status.
Returns zero if the function completes successfully, or a negative error number if an error occurs. The following are possible return values:
This function is synchronous. No LINE_REPLY message is sent. Not implemented for CDMA.
|Windows Embedded CE||Windows Embedded CE 6.0 and later|
|Windows Mobile||Pocket PC 2002 and later, Smartphone 2002 and later|