Windows 95 includes a property sheet that allows the user to change mouse settings and properties such as the tracking speed, button configuration, and double-click speed. If the contents of the mouse property sheet do not meet the needs of your device, you'll need to provide a shell extension dynamic-link library (DLL) that implements a property sheet handler. The control panel calls the property sheet handler whenever it is about to display the mouse property sheet, allowing the handler to replace existing property sheet pages and add new pages. For information about creating a shell extension that implements a property sheet handler, see the Microsoft Programmer's Guide to Windows 95.