C#

//--------------------------------------------------------------------------------
private void NormalizeForm()
{
	if (this.WindowState == FormWindowState.Minimized)
	{
		this.Visible		= true;
		this.WindowState	= FormWindowState.Normal;
	}
	this.Activate();
	// remove icon from tray
	this.notifyIcon.Visible = false; 
}

//--------------------------------------------------------------------------------
private void MainForm_Load(object sender, EventArgs e)
{
	this.ShowInTaskbar		= false;
	this.Visible			= false;
	this.WindowState		= FormWindowState.Minimized;
	this.notifyIcon.Visible	= true;
}

//--------------------------------------------------------------------------------
private void restoreToolStripMenuItem_Click(object sender, EventArgs e)
{
	NormalizeForm();
}

//--------------------------------------------------------------------------------
private void exitToolStripMenuItem_Click(object sender, EventArgs e)
{
	this.Close();
}

//--------------------------------------------------------------------------------
private void notifyIcon_DoubleClick(object sender, EventArgs e)
{
	NormalizeForm();
}