实现目的：按住某组合键时,窗体隐藏或显示,本教程代码为完整代码,直接复制即可使用,
1、创建一个类,类名命名为 Hotkey 在类中写入如下代码：
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Text; using System.Windows.Forms; using System.Runtime.InteropServices; using System.Collections; namespace WindowsFormsApplication1 { public delegate void HotkeyEventHandler(int HotKeyID); public class Hotkey : System.Windows.Forms.IMessageFilter { Hashtable keyIDs = new Hashtable(); IntPtr hWnd; static public int Hotkey1; public event HotkeyEventHandler OnHotkey; public enum KeyFlags { MOD_ALT = 0x1, MOD_CONTROL = 0x2, MOD_SHIFT = 0x4, MOD_WIN = 0x8 } [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; } } }2、在窗体中创建过程,并在加载时间中写入代码,完整代码如下：
using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Text; using System.Windows.Forms; namespace WindowsFormsApplication1 { public partial class Form1 : Form { public Form1() { InitializeComponent(); } public void OnHotkey(int HotkeyID) //alt+z隐藏窗体，再按显示窗体。 { if (HotkeyID == Hotkey.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); Hotkey.Hotkey1 = hotkey.RegisterHotkey(System.Windows.Forms.Keys.Z, Hotkey.KeyFlags.MOD_ALT); //定义快键(alt+z) hotkey.OnHotkey += new HotkeyEventHandler(OnHotkey); } } }未经允许不得转载：技术小学生 » C#设置热键(快捷键)实现隐藏和显示窗体的方法