做了个C#的Hotkey简单封装，希望对大家有帮助

本来听说winapi里面的RegisterHotKey有时候不好使，于是打算用hook键盘消息来做hook key，结果发现hook那里处理消息那里还挺麻烦，也想会不会造成系统的额外开销比较大，所以最后用RegisterHotKey来封装了一下，测试没有问题，还是可以的。（winform）

下面的代码包括一个Textbox的处理，和一个封装了api的类。Textbox那里就是处理用户定义的热键的界面表示，比如用户按键的时候会出现"Ctrl+Alt+A"之类的，Api封装那里做了处理，只管Register好了，不用管UnRegister，当注册一个一样的Id的hotkey，会自动先UnRegister原来的，然后最后关闭窗口的时候，调用一下HotkeyHelper.Dispose()就可以了。还希望多加建议。here we go..

Textbox部分：(Key hotkeyVk = null;)

private void txbHotKey_KeyDown(object sender, KeyEventArgs e)

{

txbHotKey.Text = string.Empty;

if (e.Control)

{

txbHotKey.Text += "Ctrl+";

}

if (e.Alt)

{

txbHotKey.Text += "Alt+";

}

if (e.Shift)

{

txbHotKey.Text += "Shift+";

}

if (e.KeyCode >= Keys.A && e.KeyCode <= Keys.Z)

{

if (e.Modifiers != Keys.None)

{

txbHotKey.Text += e.KeyCode.ToString();

hotkeyVk = e.KeyCode;

}

}

else if (e.KeyCode >= Keys.D0 && e.KeyCode <= Keys.D9)

{

if (e.Modifiers != Keys.None)

{

txbHotKey.Text += e.KeyCode.ToString().Remove(0, 1);

hotkeyVk = e.KeyCode;

}

}

else if (e.KeyCode >= Keys.NumPad0 && e.KeyCode <= Keys.NumPad9)

{

if (e.Modifiers != Keys.None)

{

txbHotKey.Text += e.KeyCode.ToString().Replace("Pad", "");

hotkeyVk = e.KeyCode;

}

}

else if (e.KeyCode >= Keys.F1 && e.KeyCode <= Keys.F12)

{

txbHotKey.Text += e.KeyCode.ToString();

hotkeyVk = e.KeyCode;

}

e.SuppressKeyPress = false;

e.Handled = true;

}

private void txbHotKey_KeyPress(object sender, KeyPressEventArgs e)

{

e.Handled = true;

}

private void txbHotKey_KeyUp(object sender, KeyEventArgs e)

{

CheckHotkey();

}

void txbHotKey_LostFocus(object sender, EventArgs e)

{

CheckHotkey();

}

private void CheckHotkey()

{

if (txbHotKey.Text.EndsWith("+") || txbHotKey.Text == string.Empty)

{

txbHotKey.Text = "无";

}

}

private void btnHotKey_Click(object sender, EventArgs e)

{

string hotkey = txbHotKey.Text.Replace("+", "");

if (hotkey != "无" && hotkey != string.Empty)

{

uint modifies = 0;

if (hotkey.Contains("Ctrl"))

{

modifies |= HotkeyHelper.MOD_CONTROL;

hotkey = hotkey.Replace("Ctrl", "");

}

if (hotkey.Contains("Alt"))

{

modifies |= HotkeyHelper.MOD_ALT;

hotkey = hotkey.Replace("Alt", "");

}

if (hotkey.Contains("Shift"))

{

modifies |= HotkeyHelper.MOD_SHIFT;

hotkey = hotkey.Replace("Shift", "");

}

GameProvider.HotkeyHelper.RegisterHotKey(this.Handle, hotkeyId, modifies, (uint)hotkeyVk);

}

}

HotkeyHelper部分：

using System;

using System.Collections.Generic;

using System.Text;

using GFSucker.Game.Utility;

namespace GFSucker.Game.Provider

{

public class HotkeyHelper : IDisposable

{

public const int MOD_ALT = 0x1;

public const int MOD_CONTROL = 0x2;

public const int MOD_SHIFT = 0x4;

public const int MOD_WIN = 0x8;

public const int WM_HOTKEY = 0x312;

private Dictionary<int, Hotkey> dicHotkeys;

public HotkeyHelper()

{

dicHotkeys = new Dictionary<int, Hotkey>();

}

public bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk)

{

if (dicHotkeys.ContainsKey(id))

{

if (dicHotkeys[id].IsRegistered)

{

UnregisterHotKey(dicHotkeys[id].HWnd, id); // unregister firstly

dicHotkeys[id].IsRegistered = false;

}

dicHotkeys[id].HWnd = hWnd; // set the new hwnd (normally should be the same)

}

else

{

dicHotkeys.Add(id, new Hotkey(hWnd, false));

}

dicHotkeys[id].IsRegistered = WinApi.RegisterHotKey(hWnd, id, fsModifiers, vk);

return dicHotkeys[id].IsRegistered;

}

private bool UnregisterHotKey(IntPtr hWnd, int id)

{

return WinApi.UnregisterHotKey(hWnd, id);

}

#region Hotkey Information

class Hotkey

{

public Hotkey(IntPtr hWnd, bool isRegistered)

{

_HWnd = hWnd;

_IsRegistered = isRegistered;

}

private IntPtr _HWnd;

public IntPtr HWnd

{

get { return _HWnd; }

set { _HWnd = value; }

}

private bool _IsRegistered;

public bool IsRegistered

{

get { return _IsRegistered; }

set { _IsRegistered = value; }

}

}

#endregion

#region IDisposable 成员

public void Dispose()

{

foreach (int id in dicHotkeys.Keys)

{

if (dicHotkeys[id].IsRegistered)

{

UnregisterHotKey(dicHotkeys[id].HWnd, id);

}

}

}

#endregion

}

}

Winapi声明：

[DllImport("user32.dll")]

[return: MarshalAs(UnmanagedType.Bool)]

public static extern bool RegisterHotKey(IntPtr hWnd, int id, uint fsModifiers, uint vk);

[DllImport("user32.dll")]

[return: MarshalAs(UnmanagedType.Bool)]

public static extern bool UnregisterHotKey(IntPtr hWnd, int id);

Override winform窗体的WndProc:(就是接受到hotkey信息的时候，做你想做的东西)

protected override void WndProc(ref Message m)

{

base.WndProc(ref m);

if (m.Msg == HotkeyHelper.WM_HOTKEY)

{

MainForm mainform = this.Parent.Parent.Parent.Parent.Parent.Parent.Parent.Parent.Parent as MainForm;

if (mainform != null)

{

if (mainform.WindowState == FormWindowState.Minimized)

{

mainform.WindowState = FormWindowState.Normal;

}

mainform.Activate();

}

}

}

因为直接从程序中copy出来的，代码没有很多注释，不过都是非常浅显易懂的东西，名字看上去还是一目了然的，另外说一句，我觉得如果重构得比较好的代码是不需要做过多的注释的，代码本身就是注释，注释用在解释一些比较混乱的行为意图。希望对大家有帮助咯。bye~