This is a short guide on how to get Windows 7 and Windows Vista to follow mouse focus without raising the window on top of the other. Very useful when you have many windows on your desktop and want to quickly chose what window to type in. Clicking a window to be able to type, takes to much time IMHO.
Start regedit and go to:
For full X-Mouse, add +41h to the first number stored in binary key “UserPreferencesMask”.
If you only want “focus follows mouse,” add +1h.
For example, the value for my registry hex key was “9E 3E 07 80 12 00 00 00″
I edited it to “9F 3E 07 80 12 00 00 00″ to get “focus follows mouse”
If I had wanted full X-Mouse, I’d have edited it to “D9 3E 07 80 12 00 00 00″
You can use the built in windows calculator if you like. In my case I would use 9E + 1 = 9F. Picture shows windows 7 calculator with programmer mode.