如果您希望监听全局鼠标事件，即使在其他应用程序（如浏览器或其他软件）中按下鼠标按钮也能捕捉到这些事件，您需要使用低级别的Windows API钩子。WinForms本身并不直接支持全局事件监听，但通过调用Windows API，可以实现这一功能。

winform监听全局鼠标事件

如果您希望监听全局鼠标事件，即使在其他应用程序（如浏览器或其他软件）中按下鼠标按钮也能捕捉到这些事件，您需要使用低级别的Windows API钩子。WinForms本身并不直接支持全局事件监听，但通过调用Windows API，可以实现这一功能。

使用全局鼠标钩子

为了实现全局鼠标事件监听，您可以使用SetWindowsHookEx函数来安装一个鼠标钩子。这将允许您的应用程序接收所有鼠标事件的通知，而不论鼠标指针位于哪个窗口之上。

步骤 1: 定义必要的常量和结构体

首先，定义一些常量和结构体，以便与Windows API进行交互

  public class GlobalMouseHook : IDisposable{// 钩子类型 - 全局鼠标钩子private const int WH_MOUSE_LL = 14;
​// 鼠标消息private const int WM_LBUTTONDOWN = 0x0201;private const int WM_RBUTTONDOWN = 0x0204;
​// 钩子句柄private IntPtr _hookID = IntPtr.Zero;
​// 钩子过程委托private LowLevelMouseProc _proc;
​// 钩子过程委托类型private delegate IntPtr LowLevelMouseProc(int nCode, IntPtr wParam, IntPtr lParam);
​// MSLLHOOKSTRUCT 结构[StructLayout(LayoutKind.Sequential)]private struct MSLLHOOKSTRUCT{public POINT pt;public uint mouseData;public uint flags;public uint time;public IntPtr dwExtraInfo;}
​// POINT 结构[StructLayout(LayoutKind.Sequential)]private struct POINT{public int x;public int y;} // 设置钩子[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]private static extern IntPtr SetWindowsHookEx(int idHook, LowLevelMouseProc lpfn, IntPtr hMod, uint dwThreadId);
​// 移除钩子[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)][return: MarshalAs(UnmanagedType.Bool)]private static extern bool UnhookWindowsHookEx(IntPtr hhk);
​// 调用下一个钩子[DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]private static extern IntPtr CallNextHookEx(IntPtr hhk, int nCode, IntPtr wParam, IntPtr lParam);
​// 获取当前进程模块句柄[DllImport("kernel32.dll", CharSet = CharSet.Auto, SetLastError = true)]private static extern IntPtr GetModuleHandle(string lpModuleName);private Mainform _mainForm; // 用来存储 MainForm 实例public GlobalMouseHook(Mainform mainForm){_mainForm = mainForm;_proc = HookCallback;_hookID = SetHook(_proc);}
​private IntPtr SetHook(LowLevelMouseProc proc){using (Process curProcess = Process.GetCurrentProcess())using (ProcessModule 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)){MSLLHOOKSTRUCT hookStruct = (MSLLHOOKSTRUCT)Marshal.PtrToStructure(lParam, typeof(MSLLHOOKSTRUCT));if (wParam == (IntPtr)WM_LBUTTONDOWN){_mainForm.richTextBox1.Text = "全局鼠标左键按下";//MessageBox.Show($"全局鼠标左键按下：({hookStruct.pt.x}, {hookStruct.pt.y})");}else if (wParam == (IntPtr)WM_RBUTTONDOWN){_mainForm.richTextBox1.Text = "全局鼠标右键按下";
​//MessageBox.Show($"全局鼠标右键按下：({hookStruct.pt.x}, {hookStruct.pt.y})");}}return CallNextHookEx(_hookID, nCode, wParam, lParam);}
​public void Dispose(){UnhookWindowsHookEx(_hookID);}}

// 创建 GlobalMouseHook 实例并传递当前 MainForm 实例 GlobalMouseHook mouseHook = new GlobalMouseHook(this);