private void t_Tick(object sender, EventArgs e)
{
this.t.Enabled = false;
int pos = NativeScintilla.GetCurrentPos();
if ((this._forewardStack.Count == 0 || this._forewardStack.Current.Start != pos) && (this._backwardStack.Count == 0 || this._backwardStack.Current.Start != pos))
this._backwardStack.Push(this.NewRange(pos));
}