How can I check for the existence of another device from a WDF driver?

NTDEV
1

I want to check if a device exists from WDF driver. The device I want to check for is created by a software only driver. Is my best bet to use ZwOpenFile()and see if that succeeds?

2

You haven’t given us much information on what you’re trying to do.

If the device only has a device name, yes… something like ZwCreateFile would be a good approach.

OTOH, a better approach would be to use the target device’s Device Interface GUID, and IoRegisterPlugPlayNotification. If the device you’re lo9king for HAS a Device Interface GUID.

Peter

3

Thank you so much dear