Each Pointer is identified with a [PointerPoint.PointerId][1]
. Is there a maximum number of pointers supported by WinRT or is this hugely device dependent?
It is device dependant. There are readily available monitors with 30 simultaneous contact points.
You can query the number of points on a specific device from the PointerDevice.MaxContacts property. https://msdn.microsoft.com/en-us/library/windows/apps/windows.devices.input.pointerdevice.maxcontacts.aspx
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