Casio IT-2000W manual EnableCommNotification

EnableCommNotification

BOOL EnableCommNotification(idComDev, hwnd, cbWriteNotify, cbOutQueue)

int idComDev;		/* Communication device identifier */
int hwnd;		/* Handle of window that receives the message */
int	cbWriteNotify;	/* Number of bytes written before notification */
int	cbOutQueue;	/* Minimum number of bytes of the output queue */

EnableCommNotification will enable or disable the posting of the WM_COMMNOTIFY message

to the specified window.

< Parameter >
idComDev	Specifies the communication device that posts the notification message to the
	window identified by the hwnd parameter.
	The OpenComm function returns this idComDev parameter value.
hwnd	Identifies the window to which the posting of WM_COMMNOTIFY message
	is enabled or disabled. If this parameter is NULL, EnableCommNotification
	will disable the posting of the message to the current window.
cbWriteNotify	Specifies the number of bytes to be written in the input queue of the application
	with the COM driver before the notification message is transmitted.
	A message requesting it to read the information from the input queue will be
	sent to the application.
cbOutQueue	Specifies the minimum number of bytes of the output queue. If the number of
	bytes in the output queue is less than this value, the COM driver will send a
	message to the application requesting it to write the information in the output
	queue.

<Return value >

Returns a value other than zero if the function is terminated normally. Otherwise it returns zero to

indicate that an invalid COM port identifier was specified, the port is not opened, or a function that

is not supported by RSCOMM.DRV was specified.

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