01-窗体技巧/QQ窗体/Backup/QQFrm/Form1.cs

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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;


namespace QQFrm
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        #region  公共变量
        IntPtr Tem_Handle;//获取控件及窗体的句柄
        Point CPoint;//获取控件中鼠标的坐标
        static int Tem_place = 0;
        int Frm_Height = 0;
        int FrmHeight = 0;

        #endregion

        #region  API声明
        //获取当前鼠标下可视化控件的句柄
        [DllImport("user32.dll")]
        public static extern int WindowFromPoint(int xPoint, int yPoint);
        //获取指定句柄的父级句柄
        [DllImport("user32.dll", ExactSpelling = true, CharSet = CharSet.Auto)]
        public static extern IntPtr GetParent(IntPtr hWnd);
        //获取屏幕的大小
        [DllImport("user32.dll", EntryPoint = "GetSystemMetrics")]
        private static extern int GetSystemMetrics(int mVal);
        #endregion

        #region  获取当前鼠标下可视化控件的句柄
        /// <summary>
        /// 获取当前鼠标下可视化控件的句柄
        /// </summary>
        /// <param x="int">当前鼠标的X坐标</param>
        /// <param y="int">当前鼠标的Y坐标</param>
        public IntPtr FormNameAt(int x, int y)
        {
            IntPtr Tem_hWnd;//设置存储句柄的变量
            Tem_Handle = (IntPtr)(WindowFromPoint(x, y));//获取当前鼠标下可视化控件的句柄
            Tem_hWnd = Tem_Handle;//记录原始句柄
            while (Tem_hWnd != ((IntPtr)0))//遍历该句柄的父级句柄
            {
                Tem_Handle = Tem_hWnd;//记录当前句柄
                Tem_hWnd = GetParent(Tem_hWnd);//获取父级句柄
            }
            return Tem_Handle;//返回最底层的父级句柄
        }
        #endregion