HKCU\Control Panel\Mouse
| Data type | Range | Default value |
|---|---|---|
| REG_SZ | 100 - 900 (milliseconds in decimal) | 500 |
Specifies the maximum time that can elapse between mouse clicks that is interpreted as a double-click. If the time between clicks exceeds the value of this entry, the clicks are interpreted as single clicks.
To change the value of this entry, double-click Mouse in Control Panel. Click the Buttons tab and use the Double-click speed slider.