Steema Central

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        private bool IsDragging;
        private int Fitem;
        private bool IsScrolling=false;
        private double MinX0;
        private double MinY0;
        
        private void Form1_Load(object sender, EventArgs e)
        {
            tChart1.Aspect.View3D = false;
            line1.FillSampleValues();

            Bitmap bmp = tChart1.Bitmap; 
            //After populating series, Create Annotation Tools
            for (int i = 0; i < line1.Count; i++)
            {
                Steema.TeeChart.Tools.Annotation AnnotationTool = new Steema.TeeChart.Tools.Annotation(tChart1.Chart);
                AnnotationTool.Callout.Arrow.Visible = true;
                AnnotationTool.Text = line1.YValues[i].ToString();
                MoveAnnotation(AnnotationTool, i);
            }
        }

        private void tChart1_MouseDown(object sender, MouseEventArgs e)
        {
            int i = 0;
            
            if (e.Button != tChart1.Panning.MouseButton)
            {
                foreach (Steema.TeeChart.Tools.Annotation at in tChart1.Tools)
                {
                    if (at.Shape.ShapeBounds.Contains(e.X, e.Y))
                    {
                        IsDragging = true;
                        Fitem = i;
                        tChart1.Zoom.Active = false;
                        break;
                    }
                    i++;
                } 
            }

            MinX0 = tChart1.Axes.Bottom.Minimum;
            MinY0 = tChart1.Axes.Left.Minimum;
        }

        
        
        private void tChart1_MouseMove(object sender, MouseEventArgs e)
        {
            if ((IsDragging))
            {
                MoveAnnotation(((Steema.TeeChart.Tools.Annotation)tChart1.Tools[Fitem]), Fitem, e.X, e.Y);
            }
            else if (IsScrolling)
            {
                int i = 0;
                foreach (Steema.TeeChart.Tools.Annotation at in tChart1.Tools)
                {
                    int HOffset = tChart1.Axes.Bottom.CalcXPosValue(tChart1.Axes.Bottom.Minimum) - tChart1.Axes.Bottom.CalcXPosValue(MinX0);
                    int VOffset = tChart1.Axes.Left.CalcYPosValue(tChart1.Axes.Left.Minimum) - tChart1.Axes.Left.CalcYPosValue(MinY0);

                    MoveAnnotation(at, i, at.Shape.Left - HOffset, at.Shape.Top - VOffset);
                    i++;
                } 
                
            }            
           
            MinX0 = tChart1.Axes.Bottom.Minimum;
            MinY0 = tChart1.Axes.Left.Minimum;
           
        }
   
        private void tChart1_MouseUp(object sender, MouseEventArgs e)
        {
            IsDragging = false;
            IsScrolling = false;
            tChart1.Zoom.Allow = true;
        }


        private void tChart1_Scroll(object sender, EventArgs e)
        {
            IsScrolling = true;
        }

        private void tChart1_UndoneZoom(object sender, EventArgs e)
        {
            SetAnnotationsPosition();
        }

        private void tChart1_Zoomed(object sender, EventArgs e)
        {
            SetAnnotationsPosition();
        }

        private void SetAnnotationsPosition()
        {
            Bitmap bmp = tChart1.Bitmap;

            int i = 0;
            foreach (Steema.TeeChart.Tools.Annotation at in tChart1.Tools)
            {
                MoveAnnotation(at, i);
                i++;
            }
        }

        private void MoveAnnotation(Steema.TeeChart.Tools.Annotation a, int index)
        {
            a.Left = line1.CalcXPos(index) - 15;
            a.Top = line1.CalcYPos(index) - 20;
            a.Callout.XPosition = line1.CalcXPos(index);
            a.Callout.YPosition = line1.CalcYPos(index);
        }

        private void MoveAnnotation(Steema.TeeChart.Tools.Annotation a, int index, int HOffset, int VOffset)
        {
            a.Left = HOffset;
            a.Top = VOffset;
            a.Callout.XPosition = line1.CalcXPos(index);
            a.Callout.YPosition = line1.CalcYPos(index);
        }