internal override bool SystrayChange(IntPtr handle, string tip, Icon icon, ref ToolTip tt) {
Control control;
control = Control.FromHandle(handle);
if (control != null && tt != null) {
tt.SetToolTip(control, tip);
tt.Active = true;
SendMessage(handle, Msg.WM_PAINT, IntPtr.Zero, IntPtr.Zero);
return true;
} else {
return false;
}
}