设置全局快捷键（热键）的方法代码,CSharp代码库,德仔网

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【CSharp】设置全局快捷键（热键）的方法

作者:dezai / 发布于2014/3/11/ 358

using System;
using System.Text;
using System.Data;
using System.Drawing;
using System.Collections.Generic;
using System.ComponentModel;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Collections;

namespace HotKey1
{
 public partial class Form1 : Form
 {
 public Form1()
 {
 InitializeComponent();
 }
 public delegate void HotkeyEventHandler(int HotKeyID);
 private int Hotkey1;
 public class Hotkey : System.Windows.Forms.IMessageFilter
 {
 Hashtable keyIDs = new Hashtable();
 IntPtr hWnd;

 public event HotkeyEventHandler OnHotkey;

 public enum KeyFlags
 {
 MOD_SHIFT = 0x4,
 MOD_WIN = 0x8
 MOD_ALT = 0x1,
 MOD_CONTROL = 0x2,
 }
 [DllImport("user32.dll")]
 public static extern UInt32 RegisterHotKey(IntPtr hWnd, UInt32 id, UInt32 fsModifiers, UInt32 vk);

 [DllImport("user32.dll")]
 public static extern UInt32 UnregisterHotKey(IntPtr hWnd, UInt32 id);

 [DllImport("kernel32.dll")]
 public static extern UInt32 GlobalAddAtom(String lpString);

 [DllImport("kernel32.dll")]
 public static extern UInt32 GlobalDeleteAtom(UInt32 nAtom);

 public Hotkey(IntPtr hWnd)
 {
 this.hWnd = hWnd;
 Application.AddMessageFilter(this);
 }

 public int RegisterHotkey(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;
 }

 public void UnregisterHotkeys()
 {
 Application.RemoveMessageFilter(this);
 foreach (UInt32 key in keyIDs.Values)
 {
 UnregisterHotKey(hWnd, key);
 GlobalDeleteAtom(key);
 }
 }

 public bool PreFilterMessage(ref System.Windows.Forms.Message m)
 {
 if (m.Msg == 0x312)
 {
 if (OnHotkey != null)
 {
 foreach (UInt32 key in keyIDs.Values)
 {
 if ((UInt32)m.WParam == key)
 {
 OnHotkey((int)m.WParam);
 return true;
 }
 }
 }
 }
 return false;
 }
 }

 public void OnHotkey(int HotkeyID) //Ctrl+F3隐藏窗体，再按显示窗体。http://www.xuehai.net/
 {
 if (HotkeyID == Hotkey1)
 {
 if (this.Visible == true)
 this.Visible = false;
 else
 this.Visible = true;
 }
 else
 {
 this.Visible = false;
 }
 }

 private void Form1_Load(object sender, EventArgs e)
 {
 Hotkey hotkey;
 hotkey = new Hotkey(this.Handle);
 Hotkey1 = hotkey.RegisterHotkey(System.Windows.Forms.Keys.F3, Hotkey.KeyFlags.MOD_CONTROL); //定义快键(Ctrl + F3)
 hotkey.OnHotkey += new HotkeyEventHandler(OnHotkey);
 }
 }
}

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