C#代码实现：
private void button1_Click(object sender, EventArgs e)
{
this.WindowState = FormWindowState.Maximized;
this.notifyIcon1.Visible = true;
}
private void button2_Click(object sender, EventArgs e)
{
this.WindowState = FormWindowState.Minimized;
this.notifyIcon1.Visible = true;
}
private void button3_Click(object sender, MouseEventArgs e)
{
this.WindowState = FormWindowState.Normal;
this.Visible = true;
}