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改键是一种习惯，比如在玩儿lol或者dota的时候。理论上玩儿什么游戏都可以改键。
做一个窗体（点击Install——应用改键，点击Uninstall——撤销应用）：
窗体定义代码如下：
using System.Windows.Forms; namespace KeysExchange
{
partial class Form1
{
/// <summary>
/// Required designer variable.
/// </summary>
private System.ComponentModel.IContainer components = null; /// <summary>
/// Clean up any resources being used.
/// </summary>
/// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>
protected override void Dispose(bool disposing)
{
if (disposing && (components != null))
{
components.Dispose();
}
base.Dispose(disposing);
} #region Windows Form Designer generated code /// <summary>
/// Required method for Designer support - do not modify
/// the contents of this method with the code editor.
/// </summary>
private void InitializeComponent()
{
this.intall_button = new System.Windows.Forms.Button();
this.uninstall_button = new System.Windows.Forms.Button();
this.comboBox1 = new System.Windows.Forms.ComboBox();
this.comboBox2 = new System.Windows.Forms.ComboBox();
this.label1 = new System.Windows.Forms.Label();
this.SuspendLayout();
//
// intall_button
//
this.intall_button.Location = new System.Drawing.Point(, );
this.intall_button.Name = "intall_button";
this.intall_button.Size = new System.Drawing.Size(, );
this.intall_button.TabIndex = ;
this.intall_button.Text = "Install";
this.intall_button.UseVisualStyleBackColor = true;
this.intall_button.Click += new System.EventHandler(this.intall_button_Click);
//
// uninstall_button
//
this.uninstall_button.Location = new System.Drawing.Point(, );
this.uninstall_button.Name = "uninstall_button";
this.uninstall_button.Size = new System.Drawing.Size(, );
this.uninstall_button.TabIndex = ;
this.uninstall_button.Text = "Uninstall";
this.uninstall_button.UseVisualStyleBackColor = true;
this.uninstall_button.Click += new System.EventHandler(this.uninstall_button_Click);
//
// comboBox1
//
this.comboBox1.FormattingEnabled = true;
this.comboBox1.Location = new System.Drawing.Point(, );
this.comboBox1.Name = "comboBox1";
this.comboBox1.Size = new System.Drawing.Size(, );
this.comboBox1.TabIndex = ;
this.comboBox1.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
//
// comboBox2
//
this.comboBox2.FormattingEnabled = true;
this.comboBox2.Location = new System.Drawing.Point(, );
this.comboBox2.Name = "comboBox2";
this.comboBox2.Size = new System.Drawing.Size(, );
this.comboBox2.TabIndex = ;
this.comboBox2.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
//
// label1
//
this.label1.AutoSize = true;
this.label1.Location = new System.Drawing.Point(, );
this.label1.Name = "label1";
this.label1.Size = new System.Drawing.Size(, );
this.label1.TabIndex = ;
this.label1.Text = "改为：";
//
// Form1
//
this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 13F);
this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;
this.ClientSize = new System.Drawing.Size(, );
this.Controls.Add(this.label1);
this.Controls.Add(this.comboBox2);
this.Controls.Add(this.comboBox1);
this.Controls.Add(this.uninstall_button);
this.Controls.Add(this.intall_button);
this.Name = "Form1";
this.Text = "KeysExchange";
this.ResumeLayout(false);
this.PerformLayout();
} #endregion
private System.Windows.Forms.Button intall_button;
private System.Windows.Forms.Button uninstall_button;
private System.Windows.Forms.ComboBox comboBox1;
private System.Windows.Forms.ComboBox comboBox2;
private System.Windows.Forms.Label label1;
} struct ComboItem
{
private string text;
private string value; public ComboItem(string text, string value)
{
this.text = text;
this.value = value;
} public override string ToString()
{
return this.text;
} public string ToValue()
{
return this.value;
}
}
}
钩子代码如下：
using System;
using System.Diagnostics;
using System.Runtime.InteropServices; namespace KeysExchange
{
public class KeyboardHookLib
{
private const int WH_KEYBOARD_LL = ;
private delegate int HookHandle(int nCode, int wParam, IntPtr lParam);
public delegate void ProcessKeyHandle(HookStruct param, out bool handle);
private static int _hHookValue = ;
private HookHandle _KeyBoardHookProcedure;
[StructLayout(LayoutKind.Sequential)]
public class HookStruct
{
public int vkCode;
public int scanCode;
public int flags;
public int time;
public int dwExtraInfo;
}
[DllImport("user32.dll")]
private static extern int SetWindowsHookEx(int idHook, HookHandle lpfn, IntPtr hInstance, int threadId);
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
private static extern bool UnhookWindowsHookEx(int idHook);
[DllImport("user32.dll")]
private static extern int CallNextHookEx(int idHook, int nCode, int wParam, IntPtr lParam);
[DllImport("kernel32.dll")]
private static extern int GetCurrentThreadId();
[DllImport("kernel32.dll")]
private static extern IntPtr GetModuleHandle(string name);
private IntPtr _hookWindowPtr = IntPtr.Zero;
public KeyboardHookLib() { }
private static ProcessKeyHandle _clientMethod = null;
[DllImport("user32")]
public static extern int GetKeyboardState(byte[] pbKeyState);
[DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)]
private static extern short GetKeyState(int vKey);
private const int WM_KEYDOWN = 0x100;//KEYDOWN
private const int WM_KEYUP = 0x101;//KEYUP
private const int WM_SYSKEYDOWN = 0x104;//SYSKEYDOWN
private const int WM_SYSKEYUP = 0x105;//SYSKEYUP public void InstallHook(ProcessKeyHandle clientMethod)
{
_clientMethod = clientMethod;
if (_hHookValue == )
{
_KeyBoardHookProcedure = new HookHandle(OnHookProc);
_hookWindowPtr = GetModuleHandle(Process.GetCurrentProcess().MainModule.ModuleName);
_hHookValue = SetWindowsHookEx(WH_KEYBOARD_LL, _KeyBoardHookProcedure, _hookWindowPtr, );
if (_hHookValue == ) UninstallHook();
}
} public void UninstallHook()
{
if (_hHookValue != )
{
if (UnhookWindowsHookEx(_hHookValue))
{
_hHookValue = ;
}
}
} private static int OnHookProc(int nCode, int wParam, IntPtr lParam)
{
if (nCode >= )
{
HookStruct hookStruct = (HookStruct)Marshal.PtrToStructure(lParam, typeof(HookStruct));
if (_clientMethod != null)
{
bool handle = false;
///Tylan: Judge if the event is KeyDown or not.
if (lParam.ToInt32() > && wParam == 0x100)
{
_clientMethod(hookStruct, out handle);
}
if (handle) return ;
}
}
return CallNextHookEx(_hHookValue, nCode, wParam, lParam);
}
}
}
逻辑部分代码如下：
using System;
using System.Windows.Forms; namespace KeysExchange
{
public partial class Form1 : Form
{
private KeyboardHookLib _keyboardHook = null; public Form1()
{
InitializeComponent();
for (int alp = ; alp <= ; alp++)
{
ComboItem item = new ComboItem(((Keys)alp).ToString(), alp.ToString());
comboBox1.Items.Add(item);
comboBox2.Items.Add(item);
}
} private void intall_button_Click(object sender, EventArgs e)
{
//Install the hook.
_keyboardHook = new KeyboardHookLib();
_keyboardHook.InstallHook(this.OnKeyPress);
} private void uninstall_button_Click(object sender, EventArgs e)
{
//Cancel the hook.
if (_keyboardHook != null) _keyboardHook.UninstallHook();
} public void OnKeyPress(KeyboardHookLib.HookStruct hookStruct, out bool handle)
{
handle = false;
if (((Keys)hookStruct.vkCode).ToString() == comboBox1.SelectedItem.ToString())
{
handle = true;
//Exchange the keys.
hookStruct.vkCode = int.Parse(((ComboItem)comboBox2.SelectedItem).ToValue());
Keys key = (Keys)hookStruct.vkCode;
//MessageBox.Show((key == Keys.None ? "" : key.ToString()));
System.Windows.Forms.SendKeys.Send(key.ToString().ToLower());
}
}
}
}
F5运行，找个游戏试一下，改键成功啦（按p成功打开背包）~