WinForm中实现最小化到系统托盘

有个叫NotifyIcon的控件

１、建个WinForm项目，其它操作略过。
２、拉个NotifyIcon控件，将属性Visable设置成False，在Text属性上随便填些文件。
３、实现Form的SizeChanged事件，代码如下：

if(this.WindowState == FormWindowState.Minimized) //判断是否最小化
{
this.ShowInTaskbar = false; //不显示在系统任务栏
notifyIcon.Visible = true; //托盘图标可见
}

４、实现NotifyIcon控件的DoubleClick事件，代码如下：

if(this.WindowState == FormWindowState.Minimized)
{
this.ShowInTaskbar = true; //显示在系统任务栏
this.WindowState = FormWindowState.Normal; //还原窗体
notifyIcon.Visible = false; //托盘图标隐藏
}

例题：

private ContextMenu notifyiconMnu;

#region 最小化到任务栏
/// <summary>
/// 最小化到任务栏
/// </summary>
private void Initializenotifyicon()
{
//定义一个MenuItem数组，并把此数组同时赋值给ContextMenu对象
MenuItem[] mnuItms = new MenuItem[3];
mnuItms[0] = new MenuItem();
mnuItms[0].Text = "显示窗口";
mnuItms[0].Click += new System.EventHandler(this.notifyIcon1_showfrom);

mnuItms[1] = new MenuItem("-");

mnuItms[2] = new MenuItem();
mnuItms[2].Text = "退出系统";
mnuItms[2].Click += new System.EventHandler(this.ExitSelect);
mnuItms[2].DefaultItem = true;

notifyiconMnu = new ContextMenu(mnuItms);
notifyIcon1.ContextMenu = notifyiconMnu;
//为托盘程序加入设定好的ContextMenu对象
}

private void notifyIcon1_DoubleClick(object sender, EventArgs e)
{
if (this.WindowState == FormWindowState.Minimized)
{
this.Show();
this.ShowInTaskbar = true;
this.WindowState = FormWindowState.Normal;
notifyIcon1.Visible = false;
}
}

public void notifyIcon1_showfrom(object sender, System.EventArgs e)
{
if (this.WindowState == FormWindowState.Minimized)
{
this.Show();
this.ShowInTaskbar = true;
this.WindowState = FormWindowState.Normal;
notifyIcon1.Visible = false;
}
}

public void ExitSelect(object sender, System.EventArgs e)
{
//隐藏托盘程序中的图标
notifyIcon1.Visible = false;
//关闭系统
this.Close();
this.Dispose(true);
}

#endregion
private void Form_main_SizeChanged(object sender, EventArgs e)
{
if (this.WindowState == FormWindowState.Minimized) //判断是否最小化
{
notifyIcon1.Visible = true;
this.Hide();
this.ShowInTaskbar = false;

Initializenotifyicon();
}
}