C#移动无边框的窗体怎么写。

答案：下面是一个公用类，只用把你想作为无标题栏的窗体作为参数传递进来就可以了。你可以测试下。使用有问题，请追问
/*
 * (C) wyj_slsoft 
 * Author: SLsoft
 * Description:拥有统一属性的登录窗体（或需要实现以后功能的窗体），包括无标题栏移动窗体，以及进入、退出特效，验证错误窗体抖动、窗体透明等
 * 
 */ 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;
using System.Drawing;
namespace SLsoft
{
    /// <summary>
    /// 登陆窗体
    /// </summary>
    public class LoginForm
    {
        #region 全局变量
        private int mouseX = 0;
        private int mouseY = 0;
        private Form login;
        public Timer timer_shake;
        int times = 0;
        const int AW_HOR_POSITIVE = 0x0001;
        const int AW_HOR_NEGATIVE = 0x0002;
        const int AW_VER_POSITIVE = 0X0004;
        const int AW_VER_NEGATIVE = 0x0008;
        const int AW_CENTER = 0x0010;
        const int AW_HIDE = 0x10000;
        const int AW_ACTIVATE = 0x20000;
        const int AW_SLIDE = 0x40000;
        const int AW_BLEND = 0x80000;
        #endregion
        [DllImport("user32")]
        private static extern bool AnimateWindow(IntPtr hwnd, int dwTime, int dwFlags);
        [DllImport("user32.dll", EntryPoint = "GetWindowLong", CharSet = CharSet.Auto)]
        private static extern int GetWindowLong(HandleRef hWnd, int nIndex);
        [DllImport("user32.dll", EntryPoint = "SetWindowLong", CharSet = CharSet.Auto)]
        private static extern IntPtr SetWindowLong(HandleRef hWnd, int nIndex, int dwNewLong);
        /// <summary>
        /// 登陆窗体构造函数
        /// </summary>
        /// <param name="form">需要进行处理的窗体</param>
        public LoginForm(Form form)
        {
            login = form;
            login.Load+=new EventHandler(login_Load);
            login.FormClosing += new FormClosingEventHandler(Login_FormClosing);
            login.MouseDown += new MouseEventHandler(Login_MouseDown);
            login.MouseMove += new MouseEventHandler(Login_MouseMove);
            login.BackColor = Color.Blue;
            login.TransparencyKey = Color.Blue;
            login.FormBorderStyle = FormBorderStyle.None;
            timer_shake = new Timer();
            timer_shake.Interval = 100;
            timer_shake.Tick+=new EventHandler(timer_shake_Tick);
        }
        private void Login_MouseDown(object sender, MouseEventArgs e)
        {
            mouseX = e.X;
            mouseY = e.Y;
        }
        private void Login_MouseMove(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                login.Location = new Point(Control.MousePosition.X - mouseX, Control.MousePosition.Y - mouseY);
            }
        }
        private void login_Load(object sender, EventArgs e)
        {
            AnimateWindow(login.Handle, 550, AW_CENTER | AW_ACTIVATE);
            int WS_SYSMENU = 0x00080000; int windowLong = (GetWindowLong(new HandleRef(login, login.Handle), -16));
            SetWindowLong(new HandleRef(login, login.Handle), -16, windowLong | WS_SYSMENU);
            SetWindowLong(new HandleRef(login, login.Handle), -16, WS_SYSMENU | WS_SYSMENU);//屏蔽最大化
           // SetWindowLong(new HandleRef(this, this.Handle), -16, windowLong | WS_SYSMENU); //屏蔽最小化
        }
        private void Login_FormClosing(object sender, FormClosingEventArgs e)
        {
            AnimateWindow(login.Handle, 1000, AW_SLIDE | AW_HIDE | AW_VER_NEGATIVE);
            Application.Exit();
        }
        private void timer_shake_Tick(object sender, EventArgs e)
        {
            times++;
            if (times < 8)
            {
                for (int i = 0; i < 10; i++)
                {
                    login.Location = new Point(login.Location.X + 1, login.Location.Y);
                }
                for (int i = 0; i < 10; i++)
                {
                    login.Location = new Point(login.Location.X - 1, login.Location.Y);
                }
            }
            else
            {
                times = 0;
                timer_shake.Stop();
            }
        }
    }
}
以鼠标左键单击窗体移动为例:
        private bool isMouseDown = false;//标记
        private Point FormLocation; //form的location 
        private Point mouseOffset; //鼠标的按下位置 
        private int oldHeight = 0;
        private void Form1_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                isMouseDown = true;
                FormLocation = this.Location;
                mouseOffset = Control.MousePosition;
            }
        }
        private void Form1_MouseUp(object sender, MouseEventArgs e)
        {
            isMouseDown = false;
        }
        private void Form1_MouseMove(object sender, MouseEventArgs e)
        {
            int _x = 0;
            int _y = 0;
            if (isMouseDown)
            {
                Point pt = Control.MousePosition;
                _x = mouseOffset.X - pt.X;
                _y = mouseOffset.Y - pt.Y;
                this.Location = new Point(FormLocation.X - _x, FormLocation.Y - _y);
            }
        } 

        protected override void WndProc(ref Message m)
        {
            const int WM_NCLBUTTONDBLCLK = 0x00A3;
            switch (m.Msg)
            {
                case WM_NCLBUTTONDBLCLK:
                    if (oldHeight <= 0)
                    {
                        oldHeight = ClientSize.Height;
                        ClientSize = new Size(ClientSize.Width, 0);
                    }
                    else
                    {
                        ClientSize = new Size(ClientSize.Width, oldHeight);
                        oldHeight = 0;
                    }
                    return;
            }
            base.WndProc(ref m);
        }
   bool IsLeftPressd = false;
        int MouseLeft, MouseRight, oldX, oldY;//分别保存鼠标当前点击的x，y坐标，和当前窗体的x，y
        private void Form1_MouseDown(object sender, MouseEventArgs e)
        {
            IsLeftPressd = true;//当鼠标左键按下设置为真，松开为假
            oldX =this.Location .X ;//这些都是保存当前窗易做图置的X
            oldY = this.Location.Y;//这些都是保存当前窗易做图置的X
            MouseLeft = MousePosition;//这些都是保存当前鼠标位置的X
            MouseRight = MousePosition .Y ;//这些都是保存当前鼠标位置的Y
            
        }
        private void Form1_MouseUp(object sender, MouseEventArgs e)
        {
            IsLeftPressd = false;//松开鼠标后设置为假
        }
        private void Form1_MouseMove(object sender, MouseEventArgs e)
        {
            if (IsLeftPressd)//判断是否按下了鼠标左键，且没有松开
            {
                this.Location = new Point(oldX + MousePosition.X - MouseLeft, oldY + MousePosition.Y - MouseRight);//将以前的窗体X,Y分别加上鼠标的偏移量！
            }
        }
 
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