I have used this utility with success in the past.
I can be turned on / off in the system tray at the bottom right of the windows desktop.
When invoked it gives the interface effect you request.
I've used katmouse before also. Works nice. And at one point, I had a Send Event () script that turned the program on during the Open script and off during the Close script.
As is always the case, I really had to test for unexpected behaviors...like the few fields that required scrolling became difficult to scroll when KatMouse was enabled. Ways around it, but I always find it good to be reminded.
Maybe it's windows 8 but katmouse turns off all scrolling in filemaker. Have you come across another solution?