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Hi, I'm currently port old driver to DriverKit framework. This driver use the properties mechanism to change the state of the device from user space. I would like also use it, but I can not force the call to overridden SetProperties function on driver site. Is it possible that SetProperties will be called when client call IOConnectSetCFProperties on given service? or I have to use the ExternalMethod mechanism. Or I will be possible to pass some dictionary structure which will mimic the SetProperty Call. Thank you for your answer. Best Regards, Andrzej