Clicker.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;
using System.Threading.Tasks;

namespace fastclick
{
    /**
    Most code by Nasreddine
    https://stackoverflow.com/questions/8272681/how-can-i-simulate-a-mouse-click-at-a-certain-position-on-the-screen#8273118
    */
    class Clicker
    {
        [System.Runtime.InteropServices.DllImport("user32.dll")]
        private static extern void mouse_event(int dwFlags, int dx, int dy, int cButtons, int dwExtraInfo);

        [DllImport("user32.dll")]
        private static extern bool GetCursorPos(out POINT lpPoint);

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

        private static POINT GetCursorPosition()
        {
            POINT lpPoint;
            GetCursorPos(out lpPoint);

            return lpPoint;
        }

        public const int MOUSEEVENTF_LEFTDOWN = 0x02;
        public const int MOUSEEVENTF_LEFTUP = 0x04;

        //This simulates a left mouse click
        public static void LeftMouseClick()
        {
            POINT p = GetCursorPosition();
            mouse_event(MOUSEEVENTF_LEFTDOWN, p.X, p.Y, 0, 0);
            mouse_event(MOUSEEVENTF_LEFTUP, p.X, p.Y, 0, 0);
        }
    }
}