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;

namespace?no2th
{
????public?partial?class?Form1?:?Form
????{
????????public?Form1（）
????????{
????????????InitializeComponent（）;
????????}

????????public?static?Frm_show?fs;?//這里static


????????private?void?button1_Click（object?sender?EventArgs?e）
????????{
????????????if?（fs?==?null）?//判斷是否已經(jīng)打開
????????????{
????????????????fs?=?new?Frm_show（）;
????????????????fs.Show（）;
????????????}
????????????else?{?fs.Activate（）;?}?//已經(jīng)打開則激活
????????}

????????private?void?button2_Click（object?sender?EventArgs?e）
????????{
????????????MessageBox.Show（“1“）;
????????}
????}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----

?????文件???????9216??2010-06-24?13:13??winform防止同一窗口多次打開\no2th\no2th\bin\Debug\no2th.exe

?????文件??????28160??2010-06-24?13:13??winform防止同一窗口多次打開\no2th\no2th\bin\Debug\no2th.pdb

?????文件??????14328??2010-06-24?13:12??winform防止同一窗口多次打開\no2th\no2th\bin\Debug\no2th.vshost.exe

?????文件????????490??2007-07-21?01:33??winform防止同一窗口多次打開\no2th\no2th\bin\Debug\no2th.vshost.exe.manifest

?????文件????????834??2010-06-24?13:13??winform防止同一窗口多次打開\no2th\no2th\Form1.cs

?????文件???????2665??2010-06-24?13:11??winform防止同一窗口多次打開\no2th\no2th\Form1.Designer.cs

?????文件???????5814??2010-06-24?13:11??winform防止同一窗口多次打開\no2th\no2th\Form1.resx

?????文件????????361??2010-06-24?13:11??winform防止同一窗口多次打開\no2th\no2th\Frm_show.cs

?????文件???????2056??2010-06-24?13:11??winform防止同一窗口多次打開\no2th\no2th\Frm_show.Designer.cs

?????文件???????5814??2010-06-24?13:11??winform防止同一窗口多次打開\no2th\no2th\Frm_show.resx

?????文件???????4040??2010-06-24?13:07??winform防止同一窗口多次打開\no2th\no2th\no2th.csproj

?????文件????????767??2010-06-24?13:12??winform防止同一窗口多次打開\no2th\no2th\obj\Debug\no2th.csproj.FileListAbsolute.txt

?????文件????????908??2010-06-24?13:11??winform防止同一窗口多次打開\no2th\no2th\obj\Debug\no2th.csproj.GenerateResource.Cache

?????文件???????9216??2010-06-24?13:13??winform防止同一窗口多次打開\no2th\no2th\obj\Debug\no2th.exe

?????文件????????180??2010-06-24?13:11??winform防止同一窗口多次打開\no2th\no2th\obj\Debug\no2th.Form1.resources

?????文件????????180??2010-06-24?13:11??winform防止同一窗口多次打開\no2th\no2th\obj\Debug\no2th.Frm_show.resources

?????文件??????28160??2010-06-24?13:13??winform防止同一窗口多次打開\no2th\no2th\obj\Debug\no2th.pdb

?????文件????????180??2010-06-24?13:08??winform防止同一窗口多次打開\no2th\no2th\obj\Debug\no2th.Properties.Resources.resources

?????文件????????497??2010-06-24?13:07??winform防止同一窗口多次打開\no2th\no2th\Program.cs

?????文件???????1422??2010-06-24?13:07??winform防止同一窗口多次打開\no2th\no2th\Properties\AssemblyInfo.cs

?????文件???????2839??2010-06-24?13:07??winform防止同一窗口多次打開\no2th\no2th\Properties\Resources.Designer.cs

?????文件???????5612??2010-06-24?13:07??winform防止同一窗口多次打開\no2th\no2th\Properties\Resources.resx

?????文件???????1090??2010-06-24?13:07??winform防止同一窗口多次打開\no2th\no2th\Properties\Settings.Designer.cs

?????文件????????249??2010-06-24?13:07??winform防止同一窗口多次打開\no2th\no2th\Properties\Settings.settings

?????文件????????905??2010-06-24?13:07??winform防止同一窗口多次打開\no2th\no2th.sln

????..A..H.?????14336??2010-06-24?13:13??winform防止同一窗口多次打開\no2th\no2th.suo

?????目錄??????????0??2010-06-24?13:07??winform防止同一窗口多次打開\no2th\no2th\obj\Debug\TempPE

?????目錄??????????0??2010-06-24?13:08??winform防止同一窗口多次打開\no2th\no2th\bin\Debug

?????目錄??????????0??2010-06-24?13:13??winform防止同一窗口多次打開\no2th\no2th\obj\Debug

?????目錄??????????0??2010-06-24?13:07??winform防止同一窗口多次打開\no2th\no2th\bin

............此處省略8個文件信息