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Outx_CtsFlow : Boolean Specifies whether the CTS (clear-to-send) signal is monitored
for output flow control. If this member is TRUE and CTS is turned off,
output is suspended until CTS is sent again.
CTS is a input pin. You can read its state from MSR register. It
usually connect to RTS pin in the other end.
It is often used for hardware flow control to indicate that the other
end if being waiting for data.
You can change this value when the comm is open. CTS Input on | the other end is waiting for data
------------+----------------------------------------
Input off | the other end will NOT receive any data Outx_DsrFlow : Boolean Specifies whether the DSR (data-set-ready) signal is monitored for
output flow control. If this member is TRUE and DSR is turned off,
output is suspended until DSR is sent again.
DSR is a input pin. You can read its state from MSR register. It
usually connect to DTR pin in the other end.
It is often used for hardware flow control to indicate that the other
end is working(active, ready, wait for data...)
You can change this value when the comm is open. DSR Input on | the other end is ready, and wait for your data
------------+----------------------------------------------------
Input off | the other end is not ready, we cannot send data out DtrControl : ( DtrEnable, DtrDiable, DtrHandshake ) Specifies the DTR (data-terminal-ready) flow control. This member
can be one of the following values: Value Meaning
------------- ------------------------------------------------------
DtrDiable Disables the DTR line when the device is
opened and leaves it disabled.
DtrEnable Enables the DTR line when the device is
opened and leaves it on.
DtrHandshake Enables DTR handshaking. When our comm port is opened
and ready for receiving data, DTR is enabled. When
our comm port is suspend, closed or has error
(and not cleared), DTR is disable.
If handshaking is enabled, it is an error for the
application to adjust the line by using the Win32
EscapeCommFunction function. DTR is a output pin. You can set its state in MCR register.
It usually connect to DSR pin in the other end.
You can change this value when the comm is open.
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4.自定义请继续指教wei_wang()大侠,能不能再帮我一下,
可怜我可怜的英语吧