Re: dont get the removecomplete message from the window XP.

Thanks for the reply.

My App is waiting for the DBT_DEVTYP_PORT-RemoveComplete ,
And AFAIK, I dont need to register for that notification.

Does OS send "WM_DEVICECHANGE-BROADCAST" Message by 'SendMessage'?
So If there is another process which is blocking some time,
My App can not get the BROADCAST Message?
Is My understanding about the BROADCAST Message is Correct?

If it is right, It seems not to be perfect way for recognizing
plugin/plugout of
the device.

Any suggestion will be appreciated.
Regards,
kiyo.


"Doron Holan [MS]" wrote:

are you registering for pnp notifications on the *file* handle that you open
as well?

d

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"ck" <ck@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:CA1EC189-5CC9-453D-9D98-4646E3EFEAE9@xxxxxxxxxxxxxxxx

Hello,
I'm working on WIN32 application which monitors and passes data from and
to
USB Device which also support serial communication .

I monitors device arrival/removal notification ( Serial Port ), by the
way,
especially
while I try to read data from USB device, if i remove usb device from PC,
I dont get the removecomplete message from Windows.

My process is the following.
1) Device Arrival ( Serial Port -DBT_DEVTYP_PORT)
2) Open Serial Port
3) Write/Read Serial Port
4) Close Serial Port
5) Open USB Device Port
6) Write/Read USB Device
7) if Read Failed, Close USB Device Handle
8) Device RemoveComplete ( Serial Port - DBT_DEVTYP_PORT ) ==> dont get
that
message .

The Device Driver Developer said to me that
He verified the following fact.
My app closes serial com port,
and closes USB Device port,
and Device Driver called WinAPI for Windows Event
iosetdeviceinterfacestate() to OS.
=> But My App or the other windows event collector(test program ) dont get
that messages.

After I kill My App, The RemoveComplete Event is notified.

Except closing opened port, what else should I do?
Any suggestion will be appreciated.

Regards,
kiyo,











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