using System; using System.Collections.Generic; using System.ComponentModel; using System.Data; using System.Drawing; using System.Linq; using System.Reflection; using System.Runtime.InteropServices; using System.Text; using System.Windows.Forms; namespace HookTest { public partial class Form2 : Form { public delegate int HookProc(int nCode, IntPtr wParam, IntPtr lParam); //定义钩子句柄 public static int hHook = 0; //定义钩子类型 public const int WH_MOUSE_LL = 14; public HookProc MyProcedure; //安装钩子 [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId); //卸载钩子 [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] public static extern bool UnhookWindowsHookEx(int idHook); //调用下一个钩子 [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall)] public static extern int CallNextHookEx(int idHook, int nCode, IntPtr wParam, IntPtr lParam); [StructLayout(LayoutKind.Sequential)] public class POINT { public int x; public int y; } [StructLayout(LayoutKind.Sequential)] public class MouseHookStruct { public POINT pt; public int hwnd; public int wHitTestCode; public int dwExtraInfo; } public Form2() { InitializeComponent(); } private void button1_Click(object sender, EventArgs e) { if (hHook == 0) { MyProcedure = new HookProc(this.MouseHookProc); //这里挂节钩子 hHook = SetWindowsHookEx(WH_MOUSE_LL, MyProcedure, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]), 0); if (hHook == 0) { MessageBox.Show("SetWindowsHookEx Failed"); return; } button1.Text = "卸载钩子"; } else { bool ret = UnhookWindowsHookEx(hHook); if (ret == false) { MessageBox.Show("UnhookWindowsHookEx Failed"); return; } hHook = 0; button1.Text = "安装钩子"; } } public int MouseHookProc(int nCode, IntPtr wParam, IntPtr lParam) { MouseHookStruct MyMouseHookStruct = (MouseHookStruct)Marshal.PtrToStructure(lParam, typeof(MouseHookStruct)); if (nCode < 0) { return CallNextHookEx(hHook, nCode, wParam, lParam); } else { String strCaption = "x = " + MyMouseHookStruct.pt.x.ToString("d") + " y = " + MyMouseHookStruct.pt.y.ToString("d"); this.Text = strCaption; return CallNextHookEx(hHook, nCode, wParam, lParam); } } } }