Make structural changes to repository

Modernizes the repository

source/Docking/DragForm.cs

@@ -0,0 +1,64 @@
+using System;
+using System.Windows.Forms;
+
+namespace LSLEditor.Docking
+{
+	// Inspired by Chris Sano's article:
+	// http://msdn.microsoft.com/smartclient/default.aspx?pull=/library/en-us/dnwinforms/html/colorpicker.asp
+	// In Sano's article, the DragForm needs to meet the following criteria:
+	// (1) it was not to show up in the task bar;
+	//     ShowInTaskBar = false
+	// (2) it needed to be the top-most window;
+	//     TopMost = true (not necessary here)
+	// (3) its icon could not show up in the ALT+TAB window if the user pressed ALT+TAB during a drag-and-drop;
+	//     FormBorderStyle = FormBorderStyle.None;
+	//     Create with WS_EX_TOOLWINDOW window style.
+	//     Compares with the solution in the artile by setting FormBorderStyle as FixedToolWindow,
+	//     and then clip the window caption and border, this way is much simplier.
+	// (4) it was not to steal focus from the application when displayed.
+	//     User Win32 ShowWindow API with SW_SHOWNOACTIVATE
+	// In addition, this form should only for display and therefore should act as transparent, otherwise
+	// WindowFromPoint will return this form, instead of the control beneath. Need BOTH of the following to
+	// achieve this (don't know why, spent hours to try it out :( ):
+	//  1. Enabled = false;
+	//  2. WM_NCHITTEST returns HTTRANSPARENT
+	internal class DragForm : Form
+	{
+		public DragForm()
+		{
+			FormBorderStyle = FormBorderStyle.None;
+			ShowInTaskbar = false;
+			SetStyle(ControlStyles.Selectable, false);
+			Enabled = false;
+		}
+
+		protected override CreateParams CreateParams
+		{
+			get
+			{
+				CreateParams createParams = base.CreateParams;
+				createParams.ExStyle |= (int)Win32.WindowExStyles.WS_EX_TOOLWINDOW;
+				return createParams;
+			}
+		}
+
+		protected override void WndProc(ref Message m)
+		{
+			if (m.Msg == (int)Win32.Msgs.WM_NCHITTEST)
+			{
+				m.Result = (IntPtr)Win32.HitTest.HTTRANSPARENT;
+				return;
+			}
+
+			base.WndProc (ref m);
+		}
+
+		public virtual void Show(bool bActivate)
+		{
+			if (bActivate)
+				Show();
+			else
+				NativeMethods.ShowWindow(Handle, (int)Win32.ShowWindowStyles.SW_SHOWNOACTIVATE);
+		}
+	}
+}