RivaTuner uses native Windows hotkey handling scheme by default. In most cases it works flawlessly under Windows2000/XP, but under Windows 9x almost all standard keyboard messages are suppressed when any DirectInput application uses the keyboard in exclusive mode. This results in most of games ignoring RivaTuner's hotkeys during gameplay.
You may use this value to force RivaTuner to emulate hotkeys handler when running such applications. When this value is not equal to 0 RivaTuner scans the keyboard within specified time intervals (ms) and generates required hotkey related messages when it is necessary.

Note: RivaTuner doesn't check crosslinked hotkeys in emulation mode.