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If the point is not contained with the visual sub-tree you are hit testing, Hit Test returns The coordinate value you pass as the point parameter for the Hit Test method has to be relative to the coordinate space of the visual object you are hit testing against.

For example, if you have nested visual objects defined at (100, 100) in the parent's coordinate space, then hit testing a child visual at (0, 0) is equivalent to hit testing at (100, 100) in the parent's coordinate space.

You can identify whether a point is within the geometry of a visual object, by using the Hit Test method to specify a visual object and a point coordinate value to test against.

If a visual object is found in the visual tree whose geometry contains the coordinate, it is set to the Visual Hit property of a Hit Test Result object.

The Hit Test Result is then returned from the Hit Test method.

You can hit test against the entire visual tree, or any portion of it.

In the following illustration, the circle object is on top of both the square and triangle objects.

However, there are several scenarios in which you may need to implement hit testing at the visual layer.

The purpose of the Hit Test methods in the Visual Tree Helper class is to determine whether a geometry or point coordinate value is within the rendered content of a given object, such as a control or graphic element.Forget speed dating, classified personals, or other dating sites or chatrooms: DH is the best!See who's out there by signing up on our free online dating site now!See what some of our members have had to say: Meet all kinds of attractive single women and men: Christian singles, Catholic singles, Jewish singles, sexy women, cute guys, single parents, and more!We offer 100% free online dating for everyone, including seniors, white singles, black singles, Asians, Latinos, Latinas, and everyone else.If you are only interested in hit testing the visual object whose z-order value is top-most, you can set the visual hit test enumeration to return Stop from the Hit Test Result Callback to stop the hit test traversal after the first item.

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