LabelPlus.PicView.zooming_drawing C# (CSharp) Method

        void zooming_drawing()
        {
            Thread.Sleep(100);
            if (this.InvokeRequired)
            {
                makeImageDelegate tmp = new makeImageDelegate(zooming_drawing);
                this.Invoke(tmp);
                zooming_thread = null;
            }
            else {
                MakeImageNow();
            }
        }