Forgive the formality here; this is one of my professional scripts.

Analyte 1.0 (c) 2008 Bryan Elliott
Purpose:
Simplify inclusion of Google Analytics into any site, add GA tracking to non-HTML links, and reduce 'blocking' action of Google Analytics scripts.

Use:


License:
Unlimited license granted to Abacus Studios, Inc. and I-Site, Inc.
All other parties licensed under CC-BY-SA-3.0:

Creative Commons Attribution / Share Alike 3.0 US
Fulltext and synopsis at
http://creativecommons.org/licenses/by-sa/3.0/us/

This license need not appear in minified or otherwise compressed forms
of this script, so long as the script is in active use by a web site or
application, and no other credit is claimed.

Below is a bit of code which sets up drag and drop in a treeview. This is handy for if you have a list of items that can be sorted by the user.

Here is a bit of code to demonstrate how to do this. First create a new Windows executable project. Drop a TreeView component on the form, and let's name it 'myTree' for this demonstration. Go ahead and populate it with some dummy data; enough data to see the dragging and dropping in action. You will need a variable global to the form's scope.

private TreeNode sourceNode;

This is used to track the item we are dragging in our TreeView. Then define the event handlers listed below.