1 files changed, 96 insertions, 0 deletions
diff --git a/PC/AccountValue/DragExtender.cs b/PC/AccountValue/DragExtender.cs
new file mode 100644
index 0000000..fc8a74d
--- /dev/null
+++ b/PC/AccountValue/DragExtender.cs
@@ -0,0 +1,96 @@
+using System;
+using System.Windows.Forms;
+using System.ComponentModel;
+using System.ComponentModel.Design;
+using System.Drawing;
+using System.Collections;
+using System.Runtime;
+using System.Runtime.InteropServices;
+using System.Runtime.CompilerServices;
+using System.Diagnostics;
+
+namespace AccountValue
+{
+
+	[ProvideProperty("Draggable", typeof(Control))]
+	public class DragExtender : System.ComponentModel.Component, IExtenderProvider
+	{
+
+		private const int WM_SYSCOMMAND = 0x112;
+		private const int MOUSE_MOVE = 0xF012;
+		[DllImport("User32.dll")]
+		private static extern int SendMessage(IntPtr hWnd, 
+			int msg , int wParam , ref int lParam);
+
+		[DllImport("User32.dll")]
+		private static extern int SendMessage(IntPtr hWnd, 
+			int msg , int wParam , int[] lParam);
+		[DllImport("user32")] 
+		public static extern int ReleaseCapture(IntPtr hwnd);
+
+
+
+
+		private System.ComponentModel.Container _container;
+		public DragExtender()
+		{
+			_container = new System.ComponentModel.Container();
+		}
+		#region IExtenderProvider Members
+
+		public bool CanExtend(object extendee)
+		{
+			// TODO:  Add DragExtender.CanExtend implementation
+			return (extendee is Control);
+			//return false;
+		}
+		
+		#endregion
+
+		public bool GetDraggable(Control control)
+		{
+			foreach(Control ctrl in _container.Components)
+			{
+				if (control==ctrl) return true;
+			}
+			return false;
+		}
+
+		public void SetDraggable(Control control, bool value)
+		{
+			if (value)
+			{
+				if (!GetDraggable(control))
+				{
+					this._container.Add(control);
+					control.MouseDown+=new MouseEventHandler(control_MouseDown);
+				}
+			} 
+			else
+				if (GetDraggable(control))
+			{
+				_container.Remove(control);
+			}
+		
+		}
+
+		private Form m_form = null;
+		public Form Form
+		{
+			get { return m_form; } 
+			set { m_form = value; } 
+		}
+		
+
+		private void control_MouseDown(object sender, MouseEventArgs e)
+		{
+			if (!DesignMode && m_form!=null)
+			{
+				Control control = sender as Control;
+				ReleaseCapture(control.Handle);
+				int nul =0;
+				SendMessage(m_form.Handle, WM_SYSCOMMAND, MOUSE_MOVE, ref nul);
+			}
+		}
+	}
+}
+\ No newline at end of file