public ToolTipWindow()
{
//this.ControlBox = false;
this.FormBorderStyle = FormBorderStyle.None;
this.ShowInTaskbar = false;
this.StartPosition = FormStartPosition.Manual;
this.VisibleChanged += delegate { UpdateSize(); };
this.BackColor = SystemColors.Info;
this.ForeColor = SystemColors.InfoText;
this.Font = SystemFonts.DialogFont;
label = new Label();
label.Location = new Point(5, 5);
label.AutoSize = true;
label.SizeChanged += delegate { UpdateSize(); };
this.Controls.Add(label);
}