Just to be clear here: The Windows 7 SDK (not WDK) has source code for Sensor Applications (i.e. clients consuming Sensor data) while the Windows 7
WDK has source for Sensor drivers.
Having said that, can you explain what you would like to do with the Virtual Light Sensor driver ? The driver source for that is fairly similar to the WDK Sensor sample drivers, so I'm trying understand your scenario to better point you in the correct
direction.