KsSetCommMask

The availability of this function depends on what the device supports.

Specifies a set of events to be monitored for a communications device.

Syntax

BOOL KsSetCommBreak(
     HANDLE hFile,
     DWORD dwEvtMask
);

Parameters

hFile: a handle to the communications device. The KsCreateComm function returns this handle.

dwEvtMask: the events to be enabled. A value of zero disables all events. This parameter can be one or more of the following values.

Value	Description
EV_BREAK 0x0040	A break was detected on input.
EV_CTS 0x0008	The CTS (clear-to-send) signal changed state.
EV_DSR 0x0010	The DSR (data-set-ready) signal changed state.
EV_ERR 0x0080	A line-status error occurred. Line-status errors are CE_FRAME, CE_OVERRUN, and CE_RXPARITY.
EV_RING 0x0100	A ring indicator was detected.
EV_RLSD 0x0020	The RLSD (receive-line-signal-detect) signal changed state.
EV_RXCHAR 0x0001	A character was received and placed in the input buffer.
EV_RXFLAG 0x0002	The event character was received and placed in the input buffer. The event character is specified in the device's DCB structure, which is applied to a serial port by using the KsSetCommState function.
EV_TXEMPTY 0x0004	The last character in the output buffer was sent.

Return value

If the function succeeds, it returns TRUE, otherwise FALSE. To get extended error information, call GetLastError.

Remarks

The KsSetCommMask function specifies the set of events that can be monitored for a particular communications resource. A handle to the communications resource can be specified in a call to the KsWaitCommEvent function, which waits for one of the events to occur. To get the current event mask of a communications resource, use the KsGetCommMask function.

Example

N/A

Requirements

	RT	Win32
Minimum supported version	4.0	4.0
Header	kscom.h	kscom.h
Library	KsApi_Rtss.lib	ksapi.h