C#：根据鼠标位置获取窗口句柄，名字等

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

namespace Test
{
    static class Program
    {
        /// 

        /// The main entry point for the application.
        /// 
        //[STAThread]

        [StructLayout(LayoutKind.Sequential)]//定义与API相兼容结构体，实际上是一种内存转换
        public struct POINTAPI
        {
            public int X;
            public int Y;
        }

        [DllImport("user32.dll", EntryPoint = "GetCursorPos")]//获取鼠标坐标
        public static extern int GetCursorPos(
            ref POINTAPI lpPoint
        );

        [DllImport("user32.dll", EntryPoint = "WindowFromPoint")]//指定坐标处窗体句柄
        public static extern int WindowFromPoint(
            int xPoint,
            int yPoint
        );

        [DllImport("user32.dll", EntryPoint = "GetWindowText")]
        public static extern int GetWindowText(
            int hWnd,
            StringBuilder lpString,
            int nMaxCount
        );

        [DllImport("user32.dll", EntryPoint = "GetClassName")]
        public static extern int GetClassName(
            int hWnd,
            StringBuilder lpString,
            int nMaxCont
        );

        static void Main()
        {
            POINTAPI point = new POINTAPI();//必须用与之相兼容的结构体，类也可以
            //add some wait time
            Thread.Sleep(8000);
            GetCursorPos(ref point);//获取当前鼠标坐标

            int hwnd = WindowFromPoint(point.X, point.Y);//获取指定坐标处窗口的句柄
            StringBuilder name = new StringBuilder(256);
               GetWindowText(hwnd, name, 256);
               MessageBox.Show(name.ToString());
            GetClassName(hwnd, name, 256);
            MessageBox.Show(name.ToString());

        }
    }
}