Analysing Pixels from screen

Hey guys :)

Look i need to programm an application which reads the pixels from screen and then manage to read the word. The problem is the white text always changes colour slightly so when i use getpixel the value(as long) is always changing although it is always regonisably white.

My idea is to convert them into black and white or is there any range of values which describe the white color?

Here is an example:
http://img16.imageshack.us/img16/5943/examplej.gif

Note: This is not for violation of any rules especially because its a game programmed with java.

Tnx alot :)

What I want to know, if it's Java, what are you doing in the Visual Basic forum. I think you'd be better served in the Java forum. What do you think?

No the game is in java my application is in vb.net.
Tnx

No one has any idea? :/