diff -r 3145aadca3d2 -r 0c551e8818e0 External/Aga.Controls/Tree/Input/ReorderColumnState.cs
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/External/Aga.Controls/Tree/Input/ReorderColumnState.cs	Sun May 27 15:16:19 2012 +0000
@@ -0,0 +1,101 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Drawing;
+using System.Windows.Forms;
+
+namespace Aga.Controls.Tree
+{
+	internal class ReorderColumnState : ColumnState
+	{
+		#region Properties
+
+		private Point _location;
+		public Point Location
+		{
+			get { return _location; }
+		}
+
+		private Bitmap _ghostImage;
+		public Bitmap GhostImage
+		{
+			get { return _ghostImage; }
+		}
+
+		private TreeColumn _dropColumn;
+		public TreeColumn DropColumn
+		{
+			get { return _dropColumn; }
+		}
+
+		private int _dragOffset;
+		public int DragOffset
+		{
+			get { return _dragOffset; }
+		}
+
+		#endregion
+
+		public ReorderColumnState(TreeViewAdv tree, TreeColumn column, Point initialMouseLocation)
+			: base(tree, column)
+		{
+			_location = new Point(initialMouseLocation.X + Tree.OffsetX, 0);
+			_dragOffset = tree.GetColumnX(column) - initialMouseLocation.X;
+			_ghostImage = column.CreateGhostImage(new Rectangle(0, 0, column.Width, tree.ColumnHeaderHeight), tree.Font);
+		}
+
+		public override void KeyDown(KeyEventArgs args)
+		{
+			args.Handled = true;
+			if (args.KeyCode == Keys.Escape)
+				FinishResize();
+		}
+
+		public override void MouseDown(TreeNodeAdvMouseEventArgs args)
+		{
+		}
+
+		public override void MouseUp(TreeNodeAdvMouseEventArgs args)
+		{
+			FinishResize();
+		}
+
+		public override bool MouseMove(MouseEventArgs args)
+		{
+			_dropColumn = null;
+			_location = new Point(args.X + Tree.OffsetX, 0);
+			int x = 0;
+			foreach (TreeColumn c in Tree.Columns)
+			{
+				if (c.IsVisible)
+				{
+					if (_location.X < x + c.Width / 2)
+					{
+						_dropColumn = c;
+						break;
+					}
+					x += c.Width;
+				}
+			}
+			Tree.UpdateHeaders();
+			return true;
+		}
+
+		private void FinishResize()
+		{
+			Tree.ChangeInput();
+			if (Column == DropColumn)
+				Tree.UpdateView();
+			else
+			{
+				Tree.Columns.Remove(Column);
+				if (DropColumn == null)
+					Tree.Columns.Add(Column);
+				else
+					Tree.Columns.Insert(Tree.Columns.IndexOf(DropColumn), Column);
+
+				Tree.OnColumnReordered(Column);
+			}
+		}
+	}
+}
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