In NT 4.0 Workstation we were able to make window tracking like X-Windows i.e. the active window is where the mouse is only. You don't have to click on a window to make it active and respond to keyboard input. The registry setting used to be in HKEY_CURRENT_USER\Control Panel\Mouse and the name was ActiveWindowTracking and you change the value from 0 to 1 for this to happen. In Windows 2000 this doesn't work. Does anybody know how to get the window to become active based only on mouse location and not clicking? Thanks.