Parameters\EnableWheelDetection
Applies To: Windows Server 2003, Windows Server 2003 R2, Windows Server 2003 with SP1, Windows Server 2003 with SP2
HKLM\SYSTEM\CurrentControlSet\Services\i8042prt\Parameters
| Data type | Range | Default value |
|---|---|---|
REG_DWORD |
0 | 1 | 2 |
1 |
Description
Specifies whether the driver attempts to detect and enable the wheel on the mouse device. Some devices are equipped with a mouse wheel to provide rapid scrolling and other control features if supported by an application.
| Value | Meaning |
|---|---|
0 |
Disable mouse wheel detection. The driver does not attempt to determine whether the mouse has a wheel or to enable it. Even if the mouse has a wheel, the wheel does not function in programs. |
1 |
Detect and enable the mouse wheel. If the driver detects a wheel on the mouse, then it enables the wheel. |
2 |
Enable without detecting. The driver attempts to enable a mouse wheel without determining whether the mouse has a wheel. |
Note
This entry is used only when a device is installed. When the system recognizes a new device, it copies this entry to a device-specific subkey in the Enum Subkey subkey. Thereafter, it uses only the entries in Enum.
For mouse devices that do not fully support all Intellimouse and PS/2 functions, including dynamic enabling, set the value of this entry to 2.
Tip
- To view or change the value of this entry for a particular PS/2 mouse, use Device Manager. In the tree control, click Device and then, in the results pane, click Mouse, double-click the device name, and click the Advanced Settings tab. This value appears in the Wheel Detection box.
Caution
- In rare instances, when the system tries to detect and enable the mouse wheel, the system stops responding. To recover, restart Windows Server 2003. If the problem persists, restart by using the LastKnownGood control set.