Hit test buffer.
The hit test buffer. Default value is 0.
The hit test buffer is used to make the test point "bigger" to compensate for errors and provide smoother hit-testing. For example, if the buffer value is 2, a square with sides 4 pixels long will be used around the test point to perform the hit-testing. This can be very useful when the target element is small in size on a touch device.
Medical Web Viewer .NET