A mouse speed value between 1 (slowest) and 20 (fastest).
Remarks
The mouse speed determines how far the pointer will move based on the distance the mouse moves. The value of this property ranges between 1 (slowest) and 20 (fastest). A value of 10 is the default. The value can be set by an end user using the mouse control panel application or by an application using the SystemParametersInfo function of the Platform SDK.