C＃.NET：user32.dll-SetCursorPos

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using System;

using System.Runtime.InteropServices;
using System.Threading;
using System.Windows;
using System.Windows.Interop;

namespace WpfApp
{
    /// <summary>
    /// MainWindow.xaml の相互作用ロジック
    /// </summary>
    public partial class MainWindow : Window
    {
        [DllImport("user32.dll")]
        private extern static bool GetCursorPos(out POINT lpPoint);

        [DllImport("user32.dll")]
        private extern static bool SetCursorPos(int x, int y);

        [DllImport("user32.dll")]
        private extern static bool GetWindowRect(IntPtr hwnd, out RECT lpRect);

        [DllImport("user32.dll")]
        private static extern void mouse_event(uint dwFlags, int dx, int dy, int dwData, int dwExtraInfo);
        
        public [[enum]] MouseEventFlags : uint
        {
            LEFTDOWN = 0x00000002,
            LEFTUP = 0x00000004,
            MIDDLEDOWN = 0x00000020,
            MIDDLEUP = 0x00000040,
            MOVE = 0x00000001,
            ABSOLUTE = 0x00008000,
            RIGHTDOWN = 0x00000008,
            RIGHTUP = 0x00000010,
            WHEEL = 0x00000800,
            XDOWN = 0x00000080,
            XUP = 0x00000100
        }

        /// <summary>
        /// コンストラクタ
        /// </summary>
        public MainWindow()
        {
            // コンポーネントの初期化
            InitializeComponent();
        }

        /// <summary>
        /// Click Close Button
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void BtnClose_Click(object sender, RoutedEventArgs e)
        {
            RECT rect = new RECT();

            // call user32.dll GetWindowRect method
            // get current window rect value
            if (!GetWindowRect(((HwndSource)HwndSource.FromVisual(this)).Handle, out rect))
            {
                return;
            }

            POINT goalPoint = new POINT()
            {
                X = rect.Right - 20,
                Y = rect.Top + 10
            };

            POINT currentPoint = new POINT();

            // call user32.dll GetCursorPos method
            // get current cursor position
            if (!GetCursorPos(out currentPoint))
            {
                return;
            }

            while (currentPoint.X != goalPoint.X || currentPoint.Y != goalPoint.Y)
            {
                if (currentPoint.X != goalPoint.X)
                {
                    currentPoint.X += currentPoint.X > goalPoint.X ? -1 : 1;
                }

                if (currentPoint.Y != goalPoint.Y)
                {
                    currentPoint.Y += currentPoint.Y > goalPoint.Y ? -1 : 1;
                }
                // call user32.dll SetCursorPos method
                // move cursor position
                SetCursorPos(currentPoint.X, currentPoint.Y);
                Thread.Sleep(2);
            }

            // call user32.dll mouse_event method
            // click left button
            mouse_event((uint)(MouseEventFlags.LEFTDOWN | MouseEventFlags.LEFTUP), currentPoint.X, currentPoint.Y, 0, 0);
        }

        /// <summary>
        /// point
        /// </summary>
        public struct POINT
        {
            public int X { get; set; }
            public int Y { get; set; }
        }

        /// <summary>
        /// window rect
        /// </summary>
        public struct RECT
        {
            public int Left { get; set; }
            public int Top { get; set; }
            public int Right { get; set; }
            public int Bottom { get; set; }
        }
    }
}

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