vb.net 类dll文件，实现全局HOOK
#Region "API声明导入"
Private Declare Function SetWindowsHookExA Lib "user32" (ByVal idHook As Integer, ByVal lpfn As HookProc, ByVal hMod As IntPtr, ByVal dwThreadId As Integer) As Integer
Private Declare Function UnhookWindowsHookEx Lib "user32" (ByVal idHook As Integer) As Integer
Private Declare Function CallNextHookEx Lib "user32" (ByVal idHook As Integer, ByVal nCode As Integer, ByVal wParam As Integer, ByVal lParam As IntPtr) As Integer
Private Declare Function ToAscii Lib "user32" (ByVal uVirtKey As Integer, ByVal uScancode As Integer, ByVal lpdKeyState As Byte(), ByVal lpwTransKey As Byte(), ByVal fuState As Integer) As Integer
Private Declare Function GetKeyboardState Lib "user32" (ByVal pbKeyState As Byte()) As Integer
Private Declare Function GetKeyState Lib "user32" (ByVal vKey As Integer) As Short
Public Declare Function GetModuleHandle Lib "kernel32.dll" Alias "GetModuleHandleA" (ByVal ModuleName As String) As IntPtr
Private Delegate Function HookProc(ByVal nCode As Integer, ByVal wParam As Integer, ByVal lParam As IntPtr) As Integer
#End Region
#Region "常量声明"
Private Const WH_MOUSE_LL = 14
Private Const WH_KEYBOARD_LL = 13
Private Const WH_MOUSE = 7
Private Const WH_KEYBOARD = 2
Private Const WM_MOUSEMOVE = &H200
Private Const WM_LBUTTONDOWN = &H201
Private Const WM_RBUTTONDOWN = &H204
Private Const WM_MBUTTONDOWN = &H207
Private Const WM_LBUTTONUP = &H202
Private Const WM_RBUTTONUP = &H205
Private Const WM_MBUTTONUP = &H208
Private Const WM_LBUTTONDBLCLK = &H203
Private Const WM_RBUTTONDBLCLK = &H206
Private Const WM_MBUTTONDBLCLK = &H209
Private Const WM_MOUSEWHEEL = &H20A
Private Const WM_KEYDOWN = &H100
Private Const WM_KEYUP = &H101
Private Const WM_SYSKEYDOWN = &H104
Private Const WM_SYSKEYUP = &H105
Private Const VK_SHIFT As Byte = &H10
Private Const VK_CAPITAL As Byte = &H14
Private Const VK_NUMLOCK As Byte = &H90
#End Region
#Region "事件委托处理"
Private events As New System.ComponentModel.EventHandlerList
''' <summary>鼠标激活事件</summary>
Public Custom Event MouseActivity As MouseEventHandler
AddHandler(ByVal value As MouseEventHandler)
events.AddHandler("MouseActivity", value)
End AddHandler
RemoveHandler(ByVal value As MouseEventHandler)
events.RemoveHandler("MouseActivity", value)
End RemoveHandler
RaiseEvent(ByVal sender As Object, ByVal e As System.Windows.Forms.MouseEventArgs)
Dim eh As MouseEventHandler = TryCast(events("MouseActivity"), MouseEventHandler)
If eh IsNot Nothing Then eh.Invoke(sender, e)
End RaiseEvent
End Event
''' <summary>键盘按下事件</summary>
Public Custom Event KeyDown As KeyEventHandler
AddHandler(ByVal value As KeyEventHandler)
events.AddHandler("KeyDown", value)
End AddHandler
RemoveHandler(ByVal value As KeyEventHandler)
events.RemoveHandler("KeyDown", value)
End RemoveHandler
RaiseEvent(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs)
Dim eh As KeyEventHandler = TryCast(events("KeyDown"), KeyEventHandler)
If eh IsNot Nothing Then eh.Invoke(sender, e)
End RaiseEvent
End Event
''' <summary>键盘输入事件</summary>
Public Custom Event KeyPress As KeyPressEventHandler
AddHandler(ByVal value As KeyPressEventHandler)
events.AddHandler("KeyPress", value)
End AddHandler
RemoveHandler(ByVal value As KeyPressEventHandler)
events.RemoveHandler("KeyPress", value)
End RemoveHandler
RaiseEvent(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs)
Dim eh As KeyPressEventHandler = TryCast(events("KeyPress"), KeyPressEventHandler)
If eh IsNot Nothing Then eh.Invoke(sender, e)
End RaiseEvent
End Event
''' <summary>键盘松开事件</summary>
Public Custom Event KeyUp As KeyEventHandler
AddHandler(ByVal value As KeyEventHandler)
events.AddHandler("KeyUp", value)
End AddHandler
RemoveHandler(ByVal value As KeyEventHandler)
events.RemoveHandler("KeyUp", value)
End RemoveHandler
RaiseEvent(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyEventArgs)
Dim eh As KeyEventHandler = TryCast(events("KeyUp"), KeyEventHandler)
If eh IsNot Nothing Then eh.Invoke(sender, e)
End RaiseEvent
End Event
#End Region
' ''' <summary>鼠标激活事件</summary>
'Public Event MouseActivity As MouseEventHandler
' ''' <summary>键盘按下事件</summary>
'Public Event KeyDown As KeyEventHandler
' ''' <summary>键盘输入事件</summary>
'Public Event KeyPress As KeyPressEventHandler
' ''' <summary>键盘松开事件</summary>
'Public Event KeyUp As KeyEventHandler
Private hMouseHook As Integer
Private hKeyboardHook As Integer
Private Shared MouseHookProcedure As HookProc
Private Shared KeyboardHookProcedure As HookProc
''' <summary>创建一个全局鼠标键盘钩子 (请使用Start方法开始监视)</summary>
Sub New()
'留空即可
End Sub
''' <summary>创建一个全局鼠标键盘钩子，决定是否安装钩子</summary>
''' <param name="InstallAll">是否立刻挂钩系统消息</param>
Sub New(ByVal InstallAll As Boolean)
If InstallAll Then StartHook(True, True)
End Sub
''' <summary>创建一个全局鼠标键盘钩子，并决定安装钩子的类型</summary>
''' <param name="InstallKeyboard">挂钩键盘消息</param>
''' <param name="InstallMouse">挂钩鼠标消息</param>
Sub New(ByVal InstallKeyboard As Boolean, ByVal InstallMouse As Boolean)
StartHook(InstallKeyboard, InstallMouse)
End Sub
''' <summary>析构函数</summary>
Protected Overrides Sub Finalize()
UnHook() '卸载对象时反注册系统钩子
MyBase.Finalize()
End Sub
' Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly.GetModules()(0))
''' <summary>开始安装系统钩子</summary>
''' <param name="InstallKeyboardHook">挂钩键盘消息</param>
''' <param name="InstallMouseHook">挂钩鼠标消息</param>
Public Sub StartHook(Optional ByVal InstallKeyboardHook As Boolean = True, Optional ByVal InstallMouseHook As Boolean = False)
'注册键盘钩子
If InstallKeyboardHook AndAlso hKeyboardHook = 0 Then
KeyboardHookProcedure = New HookProc(AddressOf KeyboardHookProc)
hKeyboardHook = SetWindowsHookExA(WH_KEYBOARD_LL, KeyboardHookProcedure, GetModuleHandle(Process.GetCurrentProcess().MainModule.ModuleName), 0)
If hKeyboardHook = 0 Then '检测是否注册完成
UnHook(True, False) '在这里反注册
''MessageBox.Show("键盘钩子注册失败")
Throw New Win32Exception(Marshal.GetLastWin32Error) '报告错误
End If
End If
'注册鼠标钩子
If InstallMouseHook AndAlso hMouseHook = 0 Then
MouseHookProcedure = New HookProc(AddressOf MouseHookProc)
hMouseHook = SetWindowsHookExA(WH_MOUSE_LL, MouseHookProcedure, GetModuleHandle(Process.GetCurrentProcess().MainModule.ModuleName), 0)
If hMouseHook = 0 Then
UnHook(False, True)
Throw New Win32Exception(Marshal.GetLastWin32Error) '报告错误
End If
End If
End Sub
''' <summary>立刻卸载系统钩子</summary>
''' <param name="UninstallKeyboardHook">卸载键盘钩子</param>
''' <param name="UninstallMouseHook">卸载鼠标钩子</param>
''' <param name="ThrowExceptions">是否报告错误</param>
Public Sub UnHook(Optional ByVal UninstallKeyboardHook As Boolean = True, Optional ByVal UninstallMouseHook As Boolean = True, Optional ByVal ThrowExceptions As Boolean = False)
'卸载键盘钩子
If hKeyboardHook <> 0 AndAlso UninstallKeyboardHook Then
Dim retKeyboard As Integer = UnhookWindowsHookEx(hKeyboardHook)
hKeyboardHook = 0
If ThrowExceptions AndAlso retKeyboard = 0 Then '如果出现错误，是否报告错误
Throw New Win32Exception(Marshal.GetLastWin32Error) '报告错误
End If
End If
'卸载鼠标钩子
If hMouseHook <> 0 AndAlso UninstallMouseHook Then
Dim retMouse As Integer = UnhookWindowsHookEx(hMouseHook)
hMouseHook = 0
If ThrowExceptions AndAlso retMouse = 0 Then
Throw New Win32Exception(Marshal.GetLastWin32Error)
End If
End If
End Sub
End Class
补充：VB , API
