curriculum_design/Data/HotKey.cs

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/********************************************
 *				 注册快捷键					*
 *			 Copy by MeiZhaoRui				*
 *			 2014年04月10日 更新				*
 *******************************************/
using System;
using System.Runtime.InteropServices;

namespace curriculum_design
{
	public delegate void HotkeyEventHandler(int HotKeyID);

	public class Hotkey : System.Windows.Forms.IMessageFilter
	{
		System.Collections.Hashtable keyIDs = new System.Collections.Hashtable();
		IntPtr hWnd;
		/// <summary> 
		/// Occurs when a hotkey has been pressed. 
		/// </summary> 
		public event HotkeyEventHandler OnHotkey;
		public enum KeyFlags { None = 0x0, Alt = 0x1, Control = 0x2, Shift = 0x4, Win = 0x8 }

		[DllImport("user32.dll")]
		private static extern UInt32 RegisterHotKey(IntPtr hWnd, UInt32 id,UInt32 fsModifiers, UInt32 vk);
		[DllImport("user32.dll")]
		private static extern UInt32 UnregisterHotKey(IntPtr hWnd, UInt32 id);
		[DllImport("kernel32.dll", CharSet = CharSet.Unicode)]
		private static extern UInt32 GlobalAddAtom(String lpString);
		[DllImport("kernel32.dll")]
		private static extern UInt32 GlobalDeleteAtom(UInt32 nAtom);

		/// <summary> 
		/// Constructor. Adds this instance to the MessageFilters so that this class can raise Hotkey events 
		/// </summary> 
		/// <param name="hWnd">A valid hWnd, i.e. form1.Handle</param> 
		public Hotkey(IntPtr hWnd)
		{
			this.hWnd = hWnd;
			System.Windows.Forms.Application.AddMessageFilter(this);
		}
		/// <summary> 
		/// Register a system wide hotkey. 
		/// </summary> 
		/// <param name="hWnd">form1.Handle</param> 
		/// <param name="Key">Your hotkey</param> 
		/// <returns>ID integer for your hotkey. Use this to know which hotkey was pressed.</returns> 
		public int RegisterHotkey(System.Windows.Forms.Keys Key, KeyFlags keyflags)
		{
			UInt32 hotkeyid = GlobalAddAtom(System.Guid.NewGuid().ToString());
			RegisterHotKey((IntPtr)hWnd, hotkeyid, (UInt32)keyflags, (UInt32)Key);
			keyIDs.Add(hotkeyid, hotkeyid);
			return (int)hotkeyid;
		}
		/// <summary> 
		/// Unregister hotkeys and delete atoms. 
		/// </summary> 
		public void UnRegisterHotkeys()
		{
			System.Windows.Forms.Application.RemoveMessageFilter(this);
			foreach (UInt32 key in keyIDs.Values)