C#全局鼠标钩子完整源码

以下是C#全局鼠标钩子的完整源码：

首先，创建一个名为MouseHook的类，实现IMouseHook接口：

using System;
using System.Runtime.InteropServices;

namespace MouseHookExample
{
    public class MouseHook : IMouseHook
    {
        private const int WH_MOUSE_LL = 14;
        private const int WM_LBUTTONDOWN = 0x0201;
        private const int WM_RBUTTONDOWN = 0x0204;

        private LowLevelMouseProc _proc;
        private IntPtr _hookId = IntPtr.Zero;

        public event EventHandler<MouseEventArgs> LeftButtonDown;
        public event EventHandler<MouseEventArgs> RightButtonDown;

        public void Start()
        {
            _proc = HookCallback;
            _hookId = SetHook(_proc);
        }

        public void Stop()
        {
            UnhookWindowsHookEx(_hookId);
            _hookId = IntPtr.Zero;
        }

        private IntPtr SetHook(LowLevelMouseProc proc)
        {
            using (var curProcess = System.Diagnostics.Process.GetCurrentProcess())
            using (var curModule = curProcess.MainModule)
            {
                return SetWindowsHookEx(WH_MOUSE_LL, proc, GetModuleHandle(curModule.ModuleName), 0);
            }
        }

        private IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
        {
            if (nCode >= 0 && (wParam == (IntPtr)WM_LBUTTONDOWN || wParam == (IntPtr)WM_RBUTTONDOWN))
            {
                var hookStruct = (MSLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(MSLLHOOKSTRUCT));
                var args = new MouseEventArgs(hookStruct.pt.x, hookStruct.pt.y);

                if (wParam == (IntPtr)WM_LBUTTONDOWN)
                {
                    LeftButtonDown?.Invoke(this, args);
                }
                else if (wParam == (IntPtr)WM_RBUTTONDOWN)
                {
                    RightButtonDown?.Invoke(this, args);
                }
            }

            return CallNextHookEx(_hookId, nCode, wParam, lParam);
        }

        private delegate IntPtr LowLevelMouseProc(int nCode, IntPtr wParam, IntPtr lParam);

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr SetWindowsHookEx(int idHook, LowLevelMouseProc lpfn, IntPtr hMod, uint dwThreadId);

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        [return: MarshalAs(UnmanagedType.Bool)]
        private static extern bool UnhookWindowsHookEx(IntPtr hhk);

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam);

        [DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]
        private static extern IntPtr GetModuleHandle(string lpModuleName);

        [StructLayout(LayoutKind.Sequential)]
        private struct POINT
        {
            public int x;
            public int y;
        }

        [StructLayout(LayoutKind.Sequential)]
        private struct MSLLHOOKSTRUCT
        {
            public POINT pt;
            public uint mouseData;
            public uint flags;
            public uint time;
            public IntPtr dwExtraInfo;
        }
    }
}

接下来，定义一个名为MouseEventArgs的类，用于传递鼠标事件的参数：

using System;

namespace MouseHookExample
{
    public class MouseEventArgs : EventArgs
    {
        public int X { get; }
        public int Y { get; }

        public MouseEventArgs(int x, int y)
        {
            X = x;
            Y = y;
        }
    }
}

最后，定义一个名为IMouseHook的接口，用于规范MouseHook类的实现：

using System;

namespace MouseHookExample
{
    public interface IMouseHook
    {
        event EventHandler<MouseEventArgs> LeftButtonDown;
        event EventHandler<MouseEventArgs> RightButtonDown;

        void Start();
        void Stop();
    }
}

现在，我们可以在其他类中使用该鼠标钩子：

using System;

namespace MouseHookExample
{
    class Program
    {
        static void Main(string[] args)
        {
            var mouseHook = new MouseHook();
            mouseHook.LeftButtonDown += (sender, e) => Console.WriteLine($"Left button down at ({e.X}, {e.Y})");
            mouseHook.RightButtonDown += (sender, e) => Console.WriteLine($"Right button down at ({e.X}, {e.Y})");
            mouseHook.Start();

            Console.WriteLine("Press any key to exit...");
            Console.ReadKey();
            mouseHook.Stop();
        }
    }
}

现在，当用户按下鼠标左键或右键时，程序将在控制台中输出相应的信息。