Serial Port I/O Function: Cancels any I/O in progress to the specified port.
result = SPORT_CANCEL_IO (port)
port |
(Input) Integer. The port number.
|
結果
The result type is INTEGER(4). The result is zero if successful; otherwise, a Windows* error value.
注
This call also kills the thread that keeps an outstanding read operation to the serial port. This call must be done before any of the port characteristics are modified.
例
USE IFPORT
INTEGER(4) iresult
iresult = SPORT_CANCEL_IO( 2 )
END