最新对C#模拟键盘按键，鼠标操作产生了兴趣。特从网上收集了一些常用的API用来调用键盘，鼠标操作。

class Win32API
{
#region DLL导入

/// <summary>
/// 用于设置窗口
/// </summary>
/// <param name="hWnd"></param>
/// <param name="hWndInsertAfter"></param>
/// <param name="X"></param>
/// <param name="Y"></param>
/// <param name="cx"></param>
/// <param name="cy"></param>
/// <param name="uFlags"></param>
/// <returns></returns>
[DllImport("user32.dll", CallingConvention = CallingConvention.StdCall)]
public static extern bool SetWindowPos(IntPtr hWnd, int hWndInsertAfter,
int X, int Y, int cx, int cy, int uFlags);

/// <summary>
/// 安装钩子
/// </summary>
/// <param name="idHook"></param>
/// <param name="lpfn"></param>
/// <param name="hInstance"></param>
/// <param name="threadId"></param>
/// <returns></returns>
[DllImport("user32.dll", CallingConvention = CallingConvention.StdCall)]
public static extern IntPtr SetWindowsHookEx(WH_Codes idHook, HookProc lpfn,
IntPtr pInstance, int threadId);

/// <summary>
/// 卸载钩子
/// </summary>
/// <param name="idHook"></param>
/// <returns></returns>
[DllImport("user32.dll", CallingConvention = CallingConvention.StdCall)]
public static extern bool UnhookWindowsHookEx(IntPtr pHookHandle);

/// <summary>
/// 传递钩子
/// </summary>
/// <param name="idHook"></param>
/// <param name="nCode"></param>
/// <param name="wParam"></param>
/// <param name="lParam"></param>
/// <returns></returns>
[DllImport("user32.dll", CallingConvention = CallingConvention.StdCall)]
public static extern int CallNextHookEx(IntPtr pHookHandle, int nCode,
Int32 wParam, IntPtr lParam);

/// <summary>
/// 转换当前按键信息
/// </summary>
/// <param name="uVirtKey"></param>
/// <param name="uScanCode"></param>
/// <param name="lpbKeyState"></param>
/// <param name="lpwTransKey"></param>
/// <param name="fuState"></param>
/// <returns></returns>
[DllImport("user32.dll")]
public static extern int ToAscii(UInt32 uVirtKey, UInt32 uScanCode,
byte[] lpbKeyState, byte[] lpwTransKey, UInt32 fuState);

/// <summary>
/// 获取按键状态
/// </summary>
/// <param name="pbKeyState"></param>
/// <returns>非0表示成功</returns>
[DllImport("user32.dll")]
public static extern int GetKeyboardState(byte[] pbKeyState);

[DllImport("user32.dll")]
public static extern short GetKeyStates(int vKey);

/// <summary>
/// 获取当前鼠标位置
/// </summary>
/// <param name="lpPoint"></param>
/// <returns></returns>
[DllImport("user32.dll")]
public extern static int GetCursorPos(ref POINT lpPoint);

#endregion DLL导入
}

class Hocy_Hook
{
#region 私有常量

/// <summary>
/// 按键状态数组
/// </summary>
private readonly byte[] m_KeyState = new byte[ 256 ];

private string flags;
//flag=0 正常 flag=1 监控状态 flag=2 屏蔽键盘//

#endregion 私有常量

#region 私有变量

/// <summary>
/// 鼠标钩子句柄
/// </summary>
private IntPtr m_pMouseHook = IntPtr.Zero;

/// <summary>
/// 键盘钩子句柄
/// </summary>
private IntPtr m_pKeyboardHook = IntPtr.Zero;

/// <summary>
/// 鼠标钩子委托实例
/// </summary>
/// <remarks>
/// 不要试图省略此变量,否则将会导致
/// 激活 CallbackOnCollectedDelegate 托管调试助手 (MDA)。
/// 详细请参见MSDN中关于 CallbackOnCollectedDelegate 的描述
/// </remarks>
private HookProc m_MouseHookProcedure;

/// <summary>
/// 键盘钩子委托实例
/// </summary>
/// <remarks>
/// 不要试图省略此变量,否则将会导致
/// 激活 CallbackOnCollectedDelegate 托管调试助手 (MDA)。
/// 详细请参见MSDN中关于 CallbackOnCollectedDelegate 的描述
/// </remarks>
private HookProc m_KeyboardHookProcedure;

// 添加
public event MouseEventHandler OnMouseActivity;
private const byte VK_SHIFT = 0x10 ;
private const byte VK_CAPITAL = 0x14;
private const byte VK_NUMLOCK = 0x90;

#endregion 私有变量

#region 事件定义

/// <summary>
/// 鼠标更新事件
/// </summary>
/// <remarks>当鼠标移动或者滚轮滚动时触发</remarks>
public event MouseUpdateEventHandler OnMouseUpdate;

/// <summary>
/// 按键按下事件
/// </summary>
public event KeyEventHandler OnKeyDown;

/// <summary>
/// 按键按下并释放事件
/// </summary>
public event KeyPressEventHandler OnKeyPress;

/// <summary>
/// 按键释放事件
/// </summary>
public event KeyEventHandler OnKeyUp;

#endregion 事件定义

#region 私有方法

/// <summary>
/// 鼠标钩子处理函数
/// </summary>
/// <param name="nCode"></param>
/// <param name="wParam"></param>
/// <param name="lParam"></param>
/// <returns></returns>
private int MouseHookProc( int nCode, Int32 wParam, IntPtr lParam )
{
/*if ( ( nCode >= 0 ) && ( this.OnMouseUpdate != null )
&& ( wParam == ( int )WM_MOUSE.WM_MOUSEMOVE || wParam == ( int )WM_MOUSE.WM_MOUSEWHEEL ) )
{
MouseHookStruct MouseInfo = ( MouseHookStruct )Marshal.PtrToStructure( lParam, typeof( MouseHookStruct ) );
this.OnMouseUpdate( MouseInfo.Point.X, MouseInfo.Point.Y );
}*/
//*
if ((nCode >= 0) && (OnMouseActivity != null))
{
//Marshall the data from callback.
MouseHookStruct mouseHookStruct = (MouseHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseHookStruct));

//detect button clicked
MouseButtons button = MouseButtons.None;
short mouseDelta = 0;
switch (wParam)
{
case (int)WM_MOUSE.WM_LBUTTONDOWN:
//case WM_LBUTTONUP:
//case WM_LBUTTONDBLCLK:
button = MouseButtons.Left;
break;
case (int)WM_MOUSE.WM_RBUTTONDOWN:
//case WM_RBUTTONUP:
//case WM_RBUTTONDBLCLK:
button = MouseButtons.Right;
break;
case (int)WM_MOUSE.WM_MOUSEWHEEL:
//If the message is WM_MOUSEWHEEL, the high-order word of mouseData member is the wheel delta.
//One wheel click is defined as WHEEL_DELTA, which is 120.
//(value >> 16) & 0xffff; retrieves the high-order word from the given 32-bit value
mouseDelta = (short)((mouseHookStruct.MouseData>> 16) & 0xffff);
//TODO: X BUTTONS (I havent them so was unable to test)
//If the message is WM_XBUTTONDOWN, WM_XBUTTONUP, WM_XBUTTONDBLCLK, WM_NCXBUTTONDOWN, WM_NCXBUTTONUP,
//or WM_NCXBUTTONDBLCLK, the high-order word specifies which X button was pressed or released,
//and the low-order word is reserved. This value can be one or more of the following values.
//Otherwise, mouseData is not used.
break;
}

//double clicks
int clickCount = 0;
if (button != MouseButtons.None)
if (wParam == (int)WM_MOUSE.WM_LBUTTONDBLCLK || wParam == (int)WM_MOUSE.WM_RBUTTONDBLCLK) clickCount = 2;
else clickCount = 1;

//generate event
MouseEventArgs e = new MouseEventArgs(
button,
clickCount,
mouseHookStruct.Point.X,
mouseHookStruct.Point.Y,
mouseDelta);
//raise it
OnMouseActivity(this, e);
}

//*

return Win32API.CallNextHookEx( this.m_pMouseHook, nCode, wParam, lParam );
}

/// <summary>
/// 键盘钩子处理函数
/// </summary>
/// <param name="nCode"></param>
/// <param name="wParam"></param>
/// <param name="lParam"></param>
/// <returns></returns>
/// <remarks>此版本的键盘事件处理不是很好,还有待修正.</remarks>
private int KeyboardHookProc( int nCode, Int32 wParam, IntPtr lParam )
{

switch (flags)
{
case "2":
return 1;
break;
case "1":
break;

}
bool handled = false;
//it was ok and someone listens to events
if ((nCode >= 0) && (this.OnKeyDown != null || this.OnKeyUp!= null || this.OnKeyPress!= null))
{
//read structure KeyboardHookStruct at lParam
KeyboardHookStruct MyKeyboardHookStruct = (KeyboardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyboardHookStruct));
//raise KeyDown
if (this.OnKeyDown != null && (wParam == (int)WM_KEYBOARD.WM_KEYDOWN || wParam == (int)WM_KEYBOARD.WM_SYSKEYDOWN))
{
Keys keyData = (Keys)MyKeyboardHookStruct.VKCode;
KeyEventArgs e = new KeyEventArgs(keyData);
this.OnKeyDown(this, e);
handled = handled || e.Handled;
}

// raise KeyPress
if (this.OnKeyPress != null && wParam == (int)WM_KEYBOARD.WM_KEYDOWN)
{
bool isDownShift, isDownCapslock;
try
{
isDownShift = ((Win32API.GetKeyStates(VK_SHIFT) & 0x80) == 0x80 ? true : false);
isDownCapslock = (Win32API.GetKeyStates(VK_CAPITAL) != 0 ? true : false);
}
catch
{
isDownCapslock = false;
isDownShift= false;
}

byte[] keyState = new byte[256];
Win32API.GetKeyboardState(keyState);
byte[] inBuffer = new byte[2];
if (Win32API.ToAscii(MyKeyboardHookStruct.VKCode,
MyKeyboardHookStruct.ScanCode,
keyState,
inBuffer,
MyKeyboardHookStruct.Flags) == 1)
{
char key = (char)inBuffer[0];
if ((isDownCapslock ^ isDownShift) && Char.IsLetter(key)) key = Char.ToUpper(key);
KeyPressEventArgs e = new KeyPressEventArgs(key);
this.OnKeyPress(this, e);
handled = handled || e.Handled;
}
}
// raise KeyUp
if (this.OnKeyUp != null && (wParam == (int)WM_KEYBOARD.WM_KEYUP || wParam == (int)WM_KEYBOARD.WM_SYSKEYUP))
{
Keys keyData = (Keys)MyKeyboardHookStruct.VKCode;
KeyEventArgs e = new KeyEventArgs(keyData);
this.OnKeyUp(this, e);
handled = handled || e.Handled;
}

}

//if event handled in application do not handoff to other listeners
if (handled)
return 1;
else
return Win32API.CallNextHookEx(this.m_pKeyboardHook, nCode, wParam, lParam);
}

#endregion 私有方法

#region 公共方法

/// <summary>
/// 安装钩子
/// </summary>
/// <returns></returns>
public bool InstallHook(string flagsinfo)
{
this.flags = flagsinfo;
IntPtr pInstance = Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().ManifestModule);
//pInstance = (IntPtr)4194304;
// IntPtr pInstanc2 = Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly());
// Assembly.GetExecutingAssembly().GetModules()[0]
// 假如没有安装鼠标钩子
if ( this.m_pMouseHook == IntPtr.Zero )
{
this.m_MouseHookProcedure = new HookProc( this.MouseHookProc );
this.m_pMouseHook = Win32API.SetWindowsHookEx( WH_Codes.WH_MOUSE_LL,this.m_MouseHookProcedure, pInstance, 0 );
if ( this.m_pMouseHook == IntPtr.Zero )
{
this.UnInstallHook();
return false;
}
}
if ( this.m_pKeyboardHook == IntPtr.Zero )
{
this.m_KeyboardHookProcedure = new HookProc( this.KeyboardHookProc );
this.m_pKeyboardHook = Win32API.SetWindowsHookEx( WH_Codes.WH_KEYBOARD_LL, this.m_KeyboardHookProcedure, pInstance, 0 );
if ( this.m_pKeyboardHook == IntPtr.Zero )
{
this.UnInstallHook();
return false;
}
}

return true;
}

/// <summary>
/// 卸载钩子
/// </summary>
/// <returns></returns>
public bool UnInstallHook()
{
bool result = true;
if ( this.m_pMouseHook != IntPtr.Zero )
{
result = ( Win32API.UnhookWindowsHookEx( this.m_pMouseHook ) && result );
this.m_pMouseHook = IntPtr.Zero;
}
if ( this.m_pKeyboardHook != IntPtr.Zero )
{
result = ( Win32API.UnhookWindowsHookEx( this.m_pKeyboardHook ) && result );
this.m_pKeyboardHook = IntPtr.Zero;
}

return result;
}

#endregion 公共方法

#region 构造函数

/// <summary>
/// 钩子类
/// </summary>
/// <remarks>本类仅仅简单实现了 WH_KEYBOARD_LL 以及 WH_MOUSE_LL </remarks>
public Hocy_Hook()
{

Win32API.GetKeyboardState( this.m_KeyState );
}

#endregion 构造函数
}