Registry Entries

HKEY_LOCAL_MACHINE

1. \System
1. \CurrentControlSet
1. \Services
1. \EloTouchscreen
1. \enum
2. \NTSerial0
3. \Security

The touchscreen parameters are in the \EloTouchscreen\NTSerial0 area. 

The following additional keys control the double-click area sensitivity:

HKEY_CURRENT_USER

1. \ControlPanel
1. \Mouse
2. \DoubleClickHeight
3. \DoubleClickWidth