Question

I am Creating Controls dynamically in Screen. If i place a button in Screen then it should highlight and show the distance between closest Button which is located near to the newly placed Button.

Answer 1

1. Loop thru the visual tree of the entire view using VisualTreeHelper http://www.codeproject.com/Articles/21495/Understanding-the-Visual-Tree-and-Logical-Tree-in … here check the TraverseVisualTree method that you can use to go thru all elements in a visual tree.
2. For each UIElement control check its ActualWidth & Actualheight property.
3. Get the relative coordinate positions of the current UIElement. Using this code … http://blogs.msdn.com/b/llobo/archive/2006/05/02/code-for-getting-screen-relative-position-in-wpf.aspx

Then using (relativePosition.X + actualWidth) and (relativePosition.Y + actualHeight) check for each element which one yields closest distance to the current element.