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lineSetStatusMessages

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

LONG lineSetStatusMessages(
  HLINE hLine, 
  DWORD dwLineStates, 
  DWORD dwAddressStates
);

Parameters

  • hLine
    [in] Handle to the line device.
  • dwLineStates
    [in] Value that specifies for which line-device status changes a message is to be sent to the application. This parameter uses LINEDEVSTATE.
  • dwAddressStates
    [in] Value that specifies for which address status changes a message is to be sent to the application. This parameter uses LINEADDRESSSTATE.

Return Values

Zero indicates success. A negative error number indicates that an error occurred. The following table shows the return values for this function.

Value Description
LINEERR_INVALADDRESSSTATE The address state is invalid.
LINEERR_INVALLINEHANDLE The line handle is invalid.
LINEERR_INVALLINESTATE The line state is invalid.
LINEERR_NOMEM Not enough memory is available.
LINEERR_OPERATIONFAILED The operation failed.
LINEERR_OPERATIONUNAVAIL The operation is unavailable.
LINEERR_RESOURCEUNAVAIL The resource is unavailable.
LINEERR_UNINITIALIZED A parameter is uninitialized.

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 receives. By default, address and line status reporting is disabled.

Prior to Windows CE version 2.12, LINEDEVSTATE_ messages are not supported.

Requirements

OS Versions: Windows CE 1.0 and later.
Header: Tapi.h.
Link Library: Coredll.lib.

See Also

lineInitialize | lineOpen | LINE_CLOSE | LINE_LINEDEVSTATE

 Last updated on Saturday, April 10, 2004

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