internal ToolTipWindow() {
Visible = false;
Size = new Size(100, 20);
//ForeColor = ThemeEngine.Current.ColorInfoText;
//BackColor = ThemeEngine.Current.ColorInfo;
VisibleChanged += new EventHandler(ToolTipWindow_VisibleChanged);
// UIA Framework: Used to generate UnPopup
VisibleChanged += new EventHandler (OnUIAToolTip_VisibleChanged);
SetStyle (ControlStyles.UserPaint | ControlStyles.AllPaintingInWmPaint, true);
SetStyle (ControlStyles.ResizeRedraw, true);
//if (ThemeEngine.Current.ToolTipTransparentBackground) {
// SetStyle (ControlStyles.SupportsTransparentBackColor, true);
// BackColor = Color.Transparent;
//} else
SetStyle (ControlStyles.Opaque, true);
}