Microsoft gesture recognition methods in Windows 7

Do you want to know the difference between drag, a scroll, and a sweeping selection in Windows 7. Windows 7 design team is trying hard at standardizing its touch and gesture recognition methods.

Several updates revealed that scrolling a page is most likely a motion that begins off-surface, and went on-surface like plan's takeoff and land motion. On the other hand, drag starts with a landing of the finger on the surface itself, and a dead stop. Drag continues in the direction of hand; but what will happen when it happens to be up or down, the system will easily distinguish it as a drag because it began with a dead stop.