Function IoCreateDevice 

pub unsafe extern "C" fn IoCreateDevice(
    DriverObject: PDRIVER_OBJECT,
    DeviceExtensionSize: ULONG,
    DeviceName: PUNICODE_STRING,
    DeviceType: ULONG,
    DeviceCharacteristics: ULONG,
    Exclusive: BOOLEAN,
    DeviceObject: *mut PDEVICE_OBJECT,
) -> NTSTATUS