using System;using System.Collections.Generic;using System.ComponentModel;using System.Data;using System.Drawing;using System.Text;using System.Windows.Forms;using System.Runtime.InteropServices;namespace WindowsApplication2{    public partial class Form1 : Form    {        public Form1()        {            InitializeComponent();        }        private void Form1_Load(object sender, EventArgs e)        {            this.MouseClick+=new MouseEventHandler(Form1_MouseClick);        }        void Form1_MouseClick(object sender, MouseEventArgs e)        {            MessageBox.Show("X :" + e.X.ToString() + "Y :" + e.Y.ToString());        }        private void button1_Click(object sender, EventArgs e)        {            int x=58;            int y=32;            //写法1            PostMessage(this.Handle, WM_LBUTTONDOWN, 0, (x & 0xFFFF) + (y & 0xFFFF) * 0x10000);            PostMessage(this.Handle, WM_LBUTTONUP, 0, (x & 0xFFFF) + (y & 0xFFFF) * 0x10000);            //简化下  其实就是Y坐标左移16位,然后再加上X坐标            PostMessage(this.Handle, WM_LBUTTONDOWN, 0, x + (y<<16));            PostMessage(this.Handle, WM_LBUTTONUP, 0, x+(y<<16));        }          uint WM_LBUTTONDOWN  = 0x201;          uint WM_LBUTTONUP  = 0x202;                [DllImport("user32.dll", SetLastError = true)]        static extern bool PostMessage(IntPtr hWnd, uint Msg, int wParam, int lParam);    }}

Virtual mouse click c#Int32 word = MakeLParam(x, y); private int MakeLParam(int LoWord, int HiWord)     {         return ((HiWord << 16) | (LoWord & 0xffff));     }       public static class SimInput{    [DllImport("user32.dll")]    static extern void mouse_event(uint dwFlags, uint dx, uint dy, uint dwData, UIntPtr dwExtraInfo);     [Flags]    public enum MouseEventFlags : uint    {        Move = 0x0001,        LeftDown = 0x0002,        LeftUp = 0x0004,        RightDown = 0x0008,        RightUp = 0x0010,        MiddleDown = 0x0020,        MiddleUp = 0x0040,        Absolute = 0x8000    }     public static void MouseEvent(MouseEventFlags e, uint x, uint y)    {        mouse_event((uint)e, x, y, 0, UIntPtr.Zero);    }     public static void LeftClick(Point p)    {        LeftClick((double)p.X, (double)p.Y);    }     public static void LeftClick(double x, double y)    {        var scr = Screen.PrimaryScreen.Bounds;        MouseEvent(MouseEventFlags.LeftDown | MouseEventFlags.LeftUp | MouseEventFlags.Move | MouseEventFlags.Absolute,            (uint)Math.Round(x / scr.Width * 65535),            (uint)Math.Round(y / scr.Height * 65535));    }     public static void LeftClick(int x, int y)    {        LeftClick((double)x, (double)y);    }}       public static void MouseLeftClick(Point p, int handle = 0){    //build coordinates    int coordinates = p.X | (p.Y << 16);    //send left button down    SendMessage(handle, 0x201, 0x1, coordinates);    //send left button up    SendMessage(handle, 0x202, 0x1, coordinates);}