USB drive ejection blocked

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USB drive ejection blocked

Heiko 1,291

The user can plug in any folder from any drive into my app, so also from USB drives. The app is then watching the folders changes by using FileSystemWatcher. But if the user wants to eject the drive by clicking the icon in the task notification area, it cannot be removed because obviously the FileSystemWatcher keeps this drive in usage. If I use Spy++, I connot see that my app gets any windows message which could inform my MainWindow that a ejection is requested. How can I get an information about the ejection request, so that my app can remove the FileSystemWatcher for that drive and doesn't block this operation?

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Castorix31 90,686

How can I get an information about the ejection request, so that my app can remove the FileSystemWatcher for that drive and doesn't block this operation?

Detecting Media Insertion or Removal

Heiko 1,291 Reputation points

2023-03-05T19:00:56.2833333+00:00

Yes, thank you! But I alredy consider WM_DEVICECHANGE, DBT_DEVICEARRIVAL and DBT_DEVICEREMOVECOMPLETE in my app. My question is, how I can get informed about an ejection REQUEST? I'm afraid there is no such information.
Castorix31 90,686 Reputation points

2023-03-05T20:33:01.6733333+00:00

It is DBT_DEVICEQUERYREMOVE

(tested on Windows 10 22H2 with RegisterDeviceNotification and DBT_DEVTYP_HANDLE)
Heiko 1,291 Reputation points

2023-03-05T20:42:27.9133333+00:00

Yes, I will try it.

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USB drive ejection blocked

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