WinScroll purpose is to restrict cursor movement to a given screen area as well as allow window snapping. Information about it is scarce and, alas, it is not portable saving what few settings it has to 'HKCU\Software\WinScroll'.
- [url]http://petethegoat.github.io/WinScroll/[/url] author wrote:WinScroll is a lightweight utility that can handle cursor capture and window snapping. It's free and open source.