namespace MouseHook
{ public partial class Form1 : Form { #region Fieldsprivate int hMouseHook = 0;
//全局钩子常量
private const int WH_MOUSE_LL = 14;//声明消息的常量,鼠标按下和释放
private const int WM_RBUTTONDOWN = 0x204; private const int WM_RBUTTONUP = 0x205; //保存任务栏的矩形区域 private Rectangle taskBarRect; private Rectangle newTaskBarRect;//定义委托
public delegate int HookProc(int nCode, int wParam, IntPtr lParam); private HookProc MouseHookProcedure;#endregion
#region 声明Api函数，需要引入空间(System.Runtime.InteropServices)
//寻找符合条件的窗口
[DllImport("user32.dll", EntryPoint = "FindWindow")] public static extern int FindWindow(string lpClassName,string lpWindowName);//获取窗口的矩形区域
[DllImport("user32.dll", EntryPoint = "GetWindowRect")] public static extern int GetWindowRect(int hwnd,ref Rectangle lpRect);//安装钩子
[DllImport("user32.dll")] public static extern int SetWindowsHookEx(int idHook,HookProc lpfn,IntPtr hInstance,int threadId);//卸载钩子
[DllImport("user32.dll", EntryPoint = "UnhookWindowsHookEx")] public static extern bool UnhookWindowsHookEx(int hHook);//调用下一个钩子
[DllImport("user32.dll")] public static extern int CallNextHookEx(int idHook,int nCode,int wParam,IntPtr lParam);//获取当前线程的标识符
[DllImport("kernel32.dll")] public static extern int GetCurrentThreadId();//获取一个应用程序或动态链接库的模块句柄
[DllImport("kernel32.dll")] public static extern IntPtr GetModuleHandle(string name);//鼠标结构，保存了鼠标的信息
[StructLayout(LayoutKind.Sequential)] public struct MOUSEHOOKSTRUCT { public Point pt; public int hwnd; public int wHitTestCode; public int dwExtraInfo; }#endregion
public Form1()
{ InitializeComponent(); }/// <summary>
/// 安装钩子 /// </summary> private void StartHook() { if (hMouseHook == 0) { hMouseHook = SetWindowsHookEx(WH_MOUSE_LL, MouseHookProcedure, GetModuleHandle(Process.GetCurrentProcess().MainModule.ModuleName), 0);if (hMouseHook == 0)
{//如果设置钩子失败.this.StopHook();
MessageBox.Show("Set windows hook failed!"); } } }/// <summary>
/// 卸载钩子 /// </summary> private void StopHook() { bool stop = true;if (hMouseHook != 0)
{ stop = UnhookWindowsHookEx(hMouseHook); hMouseHook = 0;if (!stop)
{//卸载钩子失败MessageBox.Show("Unhook failed!");
} } }private int MouseHookProc(int nCode, int wParam, IntPtr lParam)
{ if (nCode >= 0) { //把参数lParam在内存中指向的数据转换为MOUSEHOOKSTRUCT结构 MOUSEHOOKSTRUCT mouse = (MOUSEHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(MOUSEHOOKSTRUCT));//鼠标 //这句为了看鼠标的位置 this.Text = "MousePosition:" + mouse.pt.ToString();if (wParam == WM_RBUTTONDOWN || wParam == WM_RBUTTONUP)
{ //鼠标按下或者释放时候截获if (newTaskBarRect.Contains(mouse.pt))
{ //当鼠标在任务栏的范围内//如果返回1，则结束消息，这个消息到此为止，不再传递。
//如果返回0或调用CallNextHookEx函数则消息出了这个钩子继续往下传递，也就是传给消息真正的接受者 return 1; } } } return CallNextHookEx(hMouseHook, nCode, wParam, lParam); } #region Eventsprivate void Form1_Load(object sender, EventArgs e)
{ MouseHookProcedure = new HookProc(MouseHookProc);//taskBarHandle为返回的任务栏的句柄
//Shell_TrayWnd为任务栏的类名 int taskBarHandle = FindWindow("Shell_TrayWnd", null);//获得任务栏的区域
//有一点要注意，函数返回时，taskBarRect包含的是窗口的左上角和右下角的屏幕坐标 //就是说taskBarRect.Width和taskBarRect.Height是相对于屏幕左上角（0，0）的数值 //这与c#的Rectangle结构是不同的 GetWindowRect(taskBarHandle, ref taskBarRect);this.richTextBox1.Text = "taskBarRect.Location:" + taskBarRect.Location.ToString() + "\n"; this.richTextBox1.Text += "taskBarRect.Size:" + taskBarRect.Size.ToString() + "\n\n"; //构造一个c#中的Rectangle结构 newTaskBarRect = new Rectangle( taskBarRect.X, taskBarRect.Y, taskBarRect.Width - taskBarRect.X, taskBarRect.Height - taskBarRect.Y );
this.richTextBox1.Text += "newTaskBarRect.Location:" + newTaskBarRect.Location.ToString() + "\n";
this.richTextBox1.Text += "newTaskBarRect.Size:" + newTaskBarRect.Size.ToString();}
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{ this.StopHook(); }private void button1_Click(object sender, EventArgs e)
{ this.StartHook(); this.button1.Enabled = false; this.button2.Enabled = true;}
private void button2_Click(object sender, EventArgs e)
{ this.StopHook(); this.button1.Enabled = true; this.button2.Enabled = false; } #endregion } }本文转自94cool博客园博客，原文链接：http://www.cnblogs.com/94cool/archive/2009/08/18/1548712.html，如需转载请自行联系原作者