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lineGetStatusMessages

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This function enables an application to query which notification messages the application is set up to receive for events related to status changes for the specified line or any of its addresses.

LONG WINAPI lineGetStatusMessages(
  HLINE hLine,
  LPDWORD lpdwLineStates,
  LPDWORD lpdwAddressStates 
);

Parameters

  • hLine
    Handle to the line device.
  • lpdwLineStates
    Bit array that identifies for which line device status changes a message is to be sent to the application. If a flag is TRUE, that message is enabled; if FALSE, it is disabled. This parameter uses one or more of the LINEDEVSTATE constants.
  • lpdwAddressStates
    Bit array that identifies for which address status changes a message is to be sent to the application. If a flag is TRUE, that message is enabled; if FALSE, it is disabled. This parameter uses one or more of the LINEADDRESSSTATE constants.

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_INVALLINEHANDLE The handle to the open line device is invalid.
LINEERR_OPERATIONFAILED The operation failed.
LINEERR_INVALPOINTER The pointer is invalid.
LINEERR_RESOURCEUNAVAIL The resource is unavailable.
LINEERR_NOMEM Not enough memory is available.
LINEERR_UNINITIALIZED A parameter is not initialized.

Remarks

TAPI defines a number of messages that notify applications about events occurring on lines and addresses. An application may not be interested in receiving all address and line status change messages. The lineSetStatusMessages function can be used to select which messages the application wants to receive. By default, address status and line status reporting is disabled.

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

LINE_CLOSE | lineSetStatusMessages

 Last updated on Saturday, April 10, 2004

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