C#窗體MessageBox顯示自動消失

【說明】引自：http://xgli0910.blog.163.com/blog/static/4696216820127601455221/

【前言】 MessageBox提示框一般需要手動關閉，對於簡單的信息提示，每次還要去關閉很麻煩。於是想到怎樣能讓MessageBox顯示一段時間后自動關閉。

【代碼】

C#窗體MessageBox顯示自動消失

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

namespace pdaTraceInfoPlat.beans
{
    class MessageBoxTimeOut
    {
        private string _caption;

        public void Show(string text, string caption, int timeout)
        {
            this._caption = caption;
            StartTimer(timeout);
            MessageBox.Show(text, caption);
        }

        private void StartTimer(int interval)
        {
            Timer timer = new Timer();
            timer.Interval = interval;
            timer.Tick += new EventHandler(Timer_Tick);
            timer.Enabled = true;
        }

        private void Timer_Tick(object sender, EventArgs e)
        {
            KillMessageBox();
            //停止計時器
            ((Timer)sender).Enabled = false;
        }

        [DllImport("user32.dll", EntryPoint = "FindWindow", CharSet = CharSet.Auto)]
        private extern static IntPtr FindWindow(string lpClassName, string lpWindowName);

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
        public static extern int PostMessage(IntPtr hWnd, int msg, IntPtr wParam, IntPtr lParam);

        public const int WM_CLOSE = 0x10;

        private void KillMessageBox()
        {
            //查找MessageBox的彈出窗口,注意對應標題
            IntPtr ptr = FindWindow(null, this._caption);
            if (ptr != IntPtr.Zero)
            {
                //查找到窗口則關閉
                PostMessage(ptr, WM_CLOSE, IntPtr.Zero, IntPtr.Zero);
            }
        }       
    }
}

【注意】  windows系統中，DllImport應為user32.dll，即[DllImport("user32.dll", EntryPoint = "FindWindow", CharSet = CharSet.Auto)],

而不是   [DllImport("coredll.dll", EntryPoint = "FindWindow", CharSet = CharSet.Auto)]