Returns whether the pointer associated with the event is the primary pointer for the current mouse, touch, or pen interaction.
This property is read-only.
bPrimary = object.isPrimary
Flag that indicates whether the pointer is the primary pointer.
A single pointer is identified as the primary pointer from all current mouse, touch, and pen user interactions on the system, including activity outside Windows Internet Explorer. As such, the primary pointer might not be associated with your app or site.
The first contact in a multi-touch interaction is set as the primary pointer. Once a primary pointer is identified, all contacts must be lifted before a new contact can be identified as a primary pointer.
For apps or sites that don't process pointer input, only the primary pointer's events are promoted to mouse events. For more info about creating touch-enabled sites, see Guidelines for Building Touch-friendly Sites