问c# 快捷键功能 在应用模块输出 没事 类型 输出就无效了 ？

c# 快捷键功能 在应用模块输出 没事 类型 输出就无效了 代码如下： 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：

1. using System;
2. using System.Collections.Generic;
3. using System.ComponentModel;
4. using System.Data;
5. using System.Drawing;
6. using System.Linq;
7. using System.Text;
8. using System.Windows.Forms;
9. namespace WindowsFormsApplication1
10. {
11. public partial class Form1 : Form
12. {
13. public Form1()
14. {
15. InitializeComponent();
16. }
17. public void OnHotkey(int HotkeyID) //alt+z隐藏窗体，再按显示窗体。
18. {
19. if (HotkeyID == Hotkey.Hotkey1)
20. {
21. if (this.Visible == true)
22. this.Visible = false;
23. else
24. this.Visible = true;
25. }
26. else
27. {
28. this.Visible = false;
29. }
30. }
31. private void Form1_Load(object sender, EventArgs e)
32. {
33. Hotkey hotkey;
34. hotkey = new Hotkey(this.Handle);
35. Hotkey.Hotkey1 = hotkey.RegisterHotkey(System.Windows.Forms.Keys.Z, Hotkey.KeyFlags.MOD_ALT); //定义快键(alt+z)
36. hotkey.OnHotkey += new HotkeyEventHandler(OnHotkey);
37. }
38. }