usb connect disconnect problem

[abhi]

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

[mlimber]

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

[abhi]

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