Section C door code

[Lebedis]

There is actually a thread about this in the feedback section because its something you never do in any other part of the game:
http://frictionalgames.com/forum/showthread.php?tid=772

But basically, you have to

Spoiler below!

double click on the blank note in your inventory when you are in the room with the UV light turned on.

Yeah i forgot to edit this post lol right after 5 mins i posted this i tried that in desperation worked fine petty i will have to wait for ep2 and 3 such a great game intreging ending