SDBUS\sdslot.cpp    HandleAddDevice()
Initial, get Interface,, 之後 SDLoadDevice( )

SDBUS\sddevice.cpp  SDLoadDevice( )
從registry 取出 path.. new HostController( ), New  DriverFolder( )
之後 DriverFolder->LoadDevice( )

\DRIVERS\BUSENUM\BUSDEF\defbus.cpp  DeviceFolder::LoadDevice()
 ActivateDeviceEx( )

.. COREDLL....

然後就是 private code 的 device manager

DEVCORE\devapi.c  l_ActivateDeviceEx( )  <---!!! 這一段就有 DEVFLAGS_NOLOAD 的 ref code.