lineSetStatusMessages
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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