C＃.NET：user32.dll-GetCursorPos

user32.dllのGetCursorPosで画面上の座標を取得する。

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

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);

        private [[delegate]] void SetCursorPosDelegate(POINT point);

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

            Thread thread = new Thread(new ThreadStart(ViewCurrentCursorPos));
            thread.IsBackground = true;
            thread.Start();

        }

        /// <summary>
        /// thread method
        /// </summary>
        private void ViewCurrentCursorPos()
        {
            POINT point = new POINT();
            while (true)
            {
                // call user32.dll GetCursorPos method
                if (GetCursorPos(out point))
                {
                    SetCurosorPos(point);
                }
                Thread.Sleep(100);
            }
        }

        /// <summary>
        /// set cursor position to label content
        /// </summary>
        /// <param name="point"></param>
        private void SetCurosorPos(POINT point)
        {
            if (LblCursorPos.Dispatcher.CheckAccess())
            {
                LblCursorPos.Content = string.Format("X:{0},Y:{1}", point.X, point.Y);
            }
            else
            {
                LblCursorPos.Dispatcher.Invoke(new SetCursorPosDelegate(SetCurosorPos), point);
            }
        }

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

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