WIA - Can we pass custom color settings to a scanner?

Removing urgency is a good idea, this is your job, we want to help, but pushing us is not a good idea to get this help... most users will react annoyed or will pass from looking at your question.

Let's see if my link helps you or if any other member will do it.

PS: keep in mind that usually questions get answered really soon here. If you are not getting right answers, then it can be two things:

1. you've not posted a good question and people here is not able to understand it.
2. nobody knows how to do it.

Please read following things:
http://mycomponent.blogspot.co.il/2009/05/set-screen-brightness-in-c.html
http://www.madebits.com/retro/colormatrix/index.php
http://stackoverflow.com/questions/8194006/c-sharp-setting-screen-brightness-windows-7
http://stackoverflow.com/questions/10981518/changing-brightness-of-display-c
http://stackoverflow.com/questions/4013622/adjust-screen-brightness-using-c-sharp
and it:
http://social.msdn.microsoft.com/forums/en-US/csharpgeneral/thread/0ff3d004-9ecf-4dc4-914c-57192ffa5d18/