macOS Highlight active window

[aigo]

I have 12 windows open in one application. Is it possible to write a script that highlights the active window with a color frame? Similar to the blue frame that shows in expose.
Thanks.

 

[kainjow]

It might be possible, using the accessibility framework, Apple events, and/or CGWindow.

If you know how to program, feel free to explore those options.

 

[aigo]

It might be possible, using the accessibility framework, Apple events, and/or CGWindow.

If you know how to program, feel free to explore those options.

Thank you for your answer. Unfortunately I don't know how to program. But now I know this is possible. I found one program that does this. http://code.google.com/p/blazingstars/

Would it be easier and possible to highlight the active window titlebar with another color than grey? I can see now that the active window changes color from dark grey to light grey. Would it be possible to give the titlebar a red color?