How to check if a device is present?

[moelski]

Hi !

I can run SetupDiGetClassDevs with flags:

Code: [Select]

           var flags = onlyPresent
                        ? DsSetupApi.DIGCF_PRESENT | DsSetupApi.DIGCF_DEVICEINTERFACE
                        : DsSetupApi.DIGCF_DEVICEINTERFACE;
            deviceInfoSet = DsSetupApi.SetupDiGetClassDevs(ref guidToCheck, IntPtr.Zero, IntPtr.Zero, flags);And this works great.

But how can I detect if a device is present or not if I use only DIGCF_DEVICEINTERFACE?

Is there any flag I can check or must I perform a CreateFile and check the error in order to check if it´s present or not?

Greetings
   Dominik

[Jan Axelson]

Why not use DIGCF_present?