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Hi,

I have an application for usb mass storage devices, which listens to
the WM_DEVICECHANGE notification and upon receiving DBT_DEVICEARRIVAL
does some processing and then soft eject the usb device thru
IOCTL_STORAGE_EJECT_MEDIA command.

I am observing that when the device is ejected at the same time the
explorer is trying to open the default window for the mass storage
device and hence I am gettting an error saying "drive letter:\\ is
inaccessible". Can someone give me an idea as to how to resolve this.
Also observed that the issue is resolved if I keep a delay of around
500 milliseconds before ejecting the device but I do not want to use
Sleep(...). I am working on Windows XP.

Thanks in advance.
Abhi

abhi wrote:
> I have an application for usb mass storage devices, which listens to
> the WM_DEVICECHANGE notification and upon receiving DBT_DEVICEARRIVAL
> does some processing and then soft eject the usb device thru
> IOCTL_STORAGE_EJECT_MEDIA command.
>
> I am observing that when the device is ejected at the same time the
> explorer is trying to open the default window for the mass storage
> device and hence I am gettting an error saying "drive letter:\\ is
> inaccessible". Can someone give me an idea as to how to resolve this.
> Also observed that the issue is resolved if I keep a delay of around
> 500 milliseconds before ejecting the device but I do not want to use
> Sleep(...). I am working on Windows XP.

This is not a C++ language question (the topic of this group) but a
platform-specific question. Please see this FAQ for what is on-topic
here and for a list of ther places you might try:

http://www.parashift.com/c++-faq-lit...t.html#faq-5.9

Cheers! --M

sorry for the inconvinience cause by me and thanks for the info.

mlimber wrote:
> abhi wrote:
> > I have an application for usb mass storage devices, which listens to
> > the WM_DEVICECHANGE notification and upon receiving DBT_DEVICEARRIVAL
> > does some processing and then soft eject the usb device thru
> > IOCTL_STORAGE_EJECT_MEDIA command.
> >
> > I am observing that when the device is ejected at the same time the
> > explorer is trying to open the default window for the mass storage
> > device and hence I am gettting an error saying "drive letter:\\ is
> > inaccessible". Can someone give me an idea as to how to resolve this.
> > Also observed that the issue is resolved if I keep a delay of around
> > 500 milliseconds before ejecting the device but I do not want to use
> > Sleep(...). I am working on Windows XP.
>
> This is not a C++ language question (the topic of this group) but a
> platform-specific question. Please see this FAQ for what is on-topic
> here and for a list of ther places you might try:
>
> http://www.parashift.com/c++-faq-lit...t.html#faq-5.9
>
> Cheers! --M