C#利用Form实现Messagebox

 1操作类：

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

namespace MessageLibary
{
    public class Win32
    {
        #region Hide Menu
        public const uint POWER_FORCE = 0x00001000u;
        public const uint POWER_STATE_RESET = 0x00800000u;        // reset state

        [DllImport("coredll.dll")]
        public static extern uint SetSystemPowerState([MarshalAs(UnmanagedType.LPWStr)]string psState, uint StateFlags, uint Options);

        [DllImport("coredll.dll", EntryPoint = "FindWindow")]

        public static extern int FindWindow(string lpWindowName, string lpClassName);
        [DllImport("coredll.dll", EntryPoint = "ShowWindow")]

        public static extern bool ShowWindow(IntPtr hwnd, int nCmdShow);
        [DllImport("coredll.dll", EntryPoint = "SystemParametersInfo")]
        public static extern int SystemParametersInfo(int uAction, int uParam, ref Rectangle lpvParam, int fuWinIni);

        public const int SPI_SETWORKAREA = 47;
        public const int SPI_GETWORKAREA = 48;

        public const int SW_HIDE = 0x00;
        public const int SW_SHOW = 0x0001;
        public const int SPIF_UPDATEINIFILE = 0x01;
        #endregion

        #region MouseMove --//--

        //不能用
        [DllImport("user32.dll")]
        public static extern bool ReleaseCapture();
        [DllImport("user32.dll")]
        public static extern bool SendMessage(IntPtr hwnd, int wMsg, int wParam, int lParam);
        public const int WM_SYSCOMMAND = 0x0112;
        public const int SC_MOVE = 0xF010;
        public const int HTCAPTION = 0x0002;

        #endregion

        #region Methods

        public static bool SetFullScreen(bool fullscreen, ref Rectangle rectOld)
        {
            int Hwnd = 0;
            Hwnd = Win32.FindWindow("HHTaskBar", null);
            if (Hwnd == 0) return false;
            if (fullscreen)
            {
                Win32.ShowWindow((IntPtr)Hwnd, Win32.SW_HIDE);
                Rectangle rectFull = Screen.PrimaryScreen.Bounds;
                Win32.SystemParametersInfo(Win32.SPI_GETWORKAREA, 0, ref rectOld, Win32.SPIF_UPDATEINIFILE);//get
                Win32.SystemParametersInfo(Win32.SPI_SETWORKAREA, 0, ref rectFull, Win32.SPIF_UPDATEINIFILE);//set
            }
            else
            {
                Win32.ShowWindow((IntPtr)Hwnd, Win32.SW_SHOW);
                Win32.SystemParametersInfo(Win32.SPI_SETWORKAREA, 0, ref rectOld, Win32.SPIF_UPDATEINIFILE);
            }
            return true;
        }

        #endregion
    }
}

 

MessageLibary 类：

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

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

        private void MessageLibary_Load(object sender, EventArgs e)
        {
            //this.title.Image = new Bitmap();
            Rectangle rectangle = Screen.PrimaryScreen.Bounds;
            Win32.SetFullScreen(true, ref rectangle);//false为恢复状态栏
        }

        private void title_Paint(object sender, PaintEventArgs e)
        {
            Control con = (Control)sender;
            Graphics g = e.Graphics;
            float x = 0, y = 0;
            string title = "title message";
            Font font = new Font("宋体",9,FontStyle.Regular);
            SizeF size = g.MeasureString(title,font);
            y = (con.Height - size.Height) / 2;
            g.DrawString(title,font,new SolidBrush(Color.White),x,y);
            g.Dispose();
        }

        private void can_Click(object sender, EventArgs e)
        {
            this.Close();
            Rectangle rectangle = Screen.PrimaryScreen.Bounds;
            Win32.SetFullScreen(false, ref rectangle);//false为恢复状态栏
        }

        private void MessageLibary_MouseMove(object sender, MouseEventArgs e)
        {
        }
        Point point;
        bool leftBnt = false;
        private void title_MouseMove(object sender, MouseEventArgs e)
        {
            if (leftBnt)
            {
                Point offset = Control.MousePosition;
                offset.Offset(point.X, point.Y);
                this.Location = offset;
            }
        }

        private void title_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                point = new Point(-e.X, -e.Y);
                leftBnt = true;
            }
        }

        private void title_MouseUp(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Left)
            {
                leftBnt = true;
            }
        }
    }
}

测试：

MessageLibary.MessageLibary message = new MessageLibary.MessageLibary();
            message.ShowDialog();