There are two ways of doing this.
If you want Windows to help out, you go to -
Start> Programs> Accessories> Accessibility> Accessibility Wizard> and follow the steps
OR
For AutoCAD -
IF you need to change your current pointing device, Go to tools> Options> System > Current Pointing...
There are two ways of doing this.
If you want Windows to help out, you go to -
Start> Programs> Accessories> Accessibility> Accessibility Wizard> and follow the steps
OR For AutoCAD try
IF you need to change your current pointing device, Go to tools> Options> System > Current Pointing...