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c# 全局鼠标事件

admin7年前 (2018-02-05)C#6026

1.Win32Api

  • public class Win32Api
  • {
  • [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 delegate int HookProc(int nCode, IntPtr wParam, IntPtr lParam);
  • //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);
  • }

2.MouseHook

  • public class MouseHook
  • {
  • private Point point;
  • private Point Point
  • {
  • get { return point; }
  • set
  • {
  • if (point != value)
  • {
  • point = value;
  • if (MouseMoveEvent != null)
  • {
  • var e = new MouseEventArgs(MouseButtons.None, 0, point.X, point.Y, 0);
  • MouseMoveEvent(this, e);
  • }
  • }
  • }
  • }
  • private int hHook;
  • private static int hMouseHook = 0;
  • private const int WM_MOUSEMOVE = 0x200;
  • private const int WM_LBUTTONDOWN = 0x201;
  • private const int WM_RBUTTONDOWN = 0x204;
  • private const int WM_MBUTTONDOWN = 0x207;
  • private const int WM_LBUTTONUP = 0x202;
  • private const int WM_RBUTTONUP = 0x205;
  • private const int WM_MBUTTONUP = 0x208;
  • private const int WM_LBUTTONDBLCLK = 0x203;
  • private const int WM_RBUTTONDBLCLK = 0x206;
  • private const int WM_MBUTTONDBLCLK = 0x209;
  • public const int WH_MOUSE_LL = 14;
  • public Win32Api.HookProc hProc;
  • public MouseHook()
  • {
  • this.Point = new Point();
  • }
  • public int SetHook()
  • {
  • hProc = new Win32Api.HookProc(MouseHookProc);
  • hHook = Win32Api.SetWindowsHookEx(WH_MOUSE_LL, hProc, IntPtr.Zero, 0);
  • return hHook;
  • }
  • public void UnHook()
  • {
  • Win32Api.UnhookWindowsHookEx(hHook);
  • }
  • private int MouseHookProc(int nCode, IntPtr wParam, IntPtr lParam)
  • {
  • Win32Api.MouseHookStruct MyMouseHookStruct = (Win32Api.MouseHookStruct)Marshal.PtrToStructure(lParam, typeof(Win32Api.MouseHookStruct));
  • if (nCode < 0)
  • {
  • return Win32Api.CallNextHookEx(hHook, nCode, wParam, lParam);
  • }
  • else
  • {
  • MouseButtons button = MouseButtons.None;
  • int clickCount = 0;
  • switch ((Int32)wParam)
  • {
  • case WM_LBUTTONDOWN:
  • button = MouseButtons.Left;
  • clickCount = 1;
  • MouseDownEvent(this, new MouseEventArgs(button, clickCount, point.X, point.Y, 0));
  • break;
  • case WM_RBUTTONDOWN:
  • button = MouseButtons.Right;
  • clickCount = 1;
  • MouseDownEvent(this, new MouseEventArgs(button, clickCount, point.X, point.Y, 0));
  • break;
  • case WM_MBUTTONDOWN:
  • button = MouseButtons.Middle;
  • clickCount = 1;
  • MouseDownEvent(this, new MouseEventArgs(button, clickCount, point.X, point.Y, 0));
  • break;
  • case WM_LBUTTONUP:
  • button = MouseButtons.Left;
  • clickCount = 1;
  • MouseUpEvent(this, new MouseEventArgs(button, clickCount, point.X, point.Y, 0));
  • break;
  • case WM_RBUTTONUP:
  • button = MouseButtons.Right;
  • clickCount = 1;
  • MouseUpEvent(this, new MouseEventArgs(button, clickCount, point.X, point.Y, 0));
  • break;
  • case WM_MBUTTONUP:
  • button = MouseButtons.Middle;
  • clickCount = 1;
  • MouseUpEvent(this, new MouseEventArgs(button, clickCount, point.X, point.Y, 0));
  • break;
  • }
  • this.Point = new Point(MyMouseHookStruct.pt.x, MyMouseHookStruct.pt.y);
  • return Win32Api.CallNextHookEx(hHook, nCode, wParam, lParam);
  • }
  • }
  • public delegate void MouseMoveHandler(object sender, MouseEventArgs e);
  • public event MouseMoveHandler MouseMoveEvent;
  • public delegate void MouseClickHandler(object sender, MouseEventArgs e);
  • public event MouseClickHandler MouseClickEvent;
  • public delegate void MouseDownHandler(object sender, MouseEventArgs e);
  • public event MouseDownHandler MouseDownEvent;
  • public delegate void MouseUpHandler(object sender, MouseEventArgs e);
  • public event MouseUpHandler MouseUpEvent;
  • }

3.调用

  • MouseHook mh;
  • private void Form1_Load(object sender, EventArgs e)
  • {
  • mh = new MouseHook();
  • mh.SetHook();
  • mh.MouseDownEvent += mh_MouseDownEvent;
  • mh.MouseUpEvent += mh_MouseUpEvent;
  • }
  • bool LeftTag = false;
  • bool RightTag = false;
  • Point p1 = new Point(0,0);
  • Point p2 = new Point(0, 0);
  • //按下鼠标键触发的事件
  • private void mh_MouseDownEvent(object sender, MouseEventArgs e)
  • {
  • if (e.Button == MouseButtons.Left)
  • {
  • LeftTag = true;
  • richTextBox1.AppendText("按下了左键\n");
  • }
  • if (e.Button == MouseButtons.Right)
  • {
  • RightTag = true;
  • richTextBox1.AppendText("按下了右键\n");
  • }
  • p1 = e.Location;
  • }
  • //松开鼠标键触发的事件
  • private void mh_MouseUpEvent(object sender, MouseEventArgs e)
  • {
  • p2 = e.Location;
  • double value = Math.Sqrt(Math.Abs(p1.X - p2.X) * Math.Abs(p1.X - p2.X) + Math.Abs(p1.Y - p2.Y) * Math.Abs(p1.Y - p2.Y));
  • //if (LeftTag && RightTag && value > 100)
  • //{
  • // MessageBox.Show("ok");
  • //}
  • if (e.Button == MouseButtons.Left)
  • {
  • richTextBox1.AppendText("松开了左键\n");
  • }
  • if (e.Button == MouseButtons.Right)
  • {
  • richTextBox1.AppendText("松开了右键\n");
  • }
  • richTextBox1.AppendText("移动了" + value + "距离\n");
  • RightTag = false;
  • LeftTag = false;
  • p1 = new Point(0, 0);
  • p2 = new Point(0, 0);
  • }
  • private void Form1_FormClosed(object sender, FormClosedEventArgs e)
  • {
  • mh.UnHook();
  • }

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