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??公共變量
????????IntPtr?Tem_Handle;//獲取控件及窗體的句柄
????????Point?CPoint;//獲取控件中鼠標(biāo)的坐標(biāo)
????????static?int?Tem_place?=?0;
????????int?Frm_Height?=?0;
????????int?FrmHeight?=?0;

????????#endregion

????????#region??API聲明
????????//獲取當(dāng)前鼠標(biāo)下可視化控件的句柄
????????[DllImport（“user32.dll“）]
????????public?static?extern?int?WindowFromPoint（int?xPoint?int?yPoint）;
????????//獲取指定句柄的父級句柄
????????[DllImport（“user32.dll“?ExactSpelling?=?true?CharSet?=?CharSet.Auto）]
????????public?static?extern?IntPtr?GetParent（IntPtr?hWnd）;
????????//獲取屏幕的大小
????????[DllImport（“user32.dll“?EntryPoint?=?“GetSystemMetrics“）]
????????private?static?extern?int?GetSystemMetrics（int?mVal）;
????????#endregion

????????#region??獲取當(dāng)前鼠標(biāo)下可視化控件的句柄
????????///?

????????///?獲取當(dāng)前鼠標(biāo)下可視化控件的句柄
????????///?

????????///?當(dāng)前鼠標(biāo)的X坐標(biāo)
????????///?當(dāng)前鼠標(biāo)的Y坐標(biāo)
????????public?IntPtr?FormNameAt（int?x?int?y）
????????{
????????????IntPtr?Tem_hWnd;//設(shè)置存儲句柄的變量
????????????Tem_Handle?=?（IntPtr）（WindowFromPoint（x?y））;//獲取當(dāng)前鼠標(biāo)下可視化控件的句柄
????????????Tem_hWnd?=?Tem_Handle;//記錄原始句柄
????????????while?（Tem_hWnd?!=?（（IntPtr）0））//遍歷該句柄的父級句柄
????????????{
????????????????Tem_Handle?=?Tem_hWnd;//記錄當(dāng)前句柄
????????????????Tem_hWnd?=?GetParent（Tem_hWnd）;//獲取父級句柄
????????????}
????????????return?Tem_Handle;//返回最底層的父級句柄
????????}
????????#endregion


????????private?void?timer1_Tick（object?sender?EventArgs?e）
????????{
????????????if?（this.Top?????????????????{
????????????????????if?（this.Handle?==?FormNameAt（Cursor.Position.X?Cursor.Position.Y））//當(dāng)鼠標(biāo)移致到該窗體上
????????????????????{
????????????????????????panel_title.Tag?=?1;//設(shè)置標(biāo)識，用于判斷窗體在屏幕頂部
????????????????????????timer2.Enabled?=?false;//不對窗體進(jìn)行拉伸操作
????????????????????????this.Top?=?0;//使窗體致頂
????????????????????}
????????????????????else
????????????????????{
????????????????????????panel_title.Tag?=?1;//設(shè)置標(biāo)識，用于判斷窗體在屏幕頂部
????????????????????????timer2.Enabled?=?true;//將窗體在頂部進(jìn)行隱藏
????????????????????}
????????????????}
????????????????else
????????????????{
????????????????????if?（this.Left??GetSystemMetrics（0）?-?3）//如果窗體被移到屏幕的左端或右端
????????????????????{
????????????????????????if?（this.Left?????????????????????????{
????????????????????????????if?（this.Handle?==?FormNameAt（Cursor.Position.X?Cursor.Position.Y））//當(dāng)鼠標(biāo)移致到該窗體上
????????????????????????????{
????????????????????????????????panel_title.Tag?=?2;//設(shè)置標(biāo)識，用于判斷窗體在屏幕左端
????????????????????????????????timer2.Enabled?=?false;
?????????