.NET (Core and Framework)

<br />
  public class PieWithExclusionEllipse : IDisposable {<br />
    private GraphicsPath path;<br />
    public GraphicsPath Path { get { return this.path; } }<br />
    public PieWithExclusionEllipse(Rectangle pie, float startAngle, float sweepAngle, Rectangle exclusionEllipse) {<br />
      GraphicsPath outerLine = new GraphicsPath();<br />
      GraphicsPath innerLine = new GraphicsPath();<br />
<br />
      outerLine = new GraphicsPath();<br />
      outerLine.AddPie(pie, startAngle, sweepAngle);<br />
<br />
      if ((exclusionEllipse.Width != 0) && (exclusionEllipse.Height != 0)) {<br />
        outerLine = this.removePointFromPath(outerLine, 0);<br />
        outerLine = this.changePathPointType(outerLine, outerLine.PointCount - 1, PathPointType.Bezier);<br />
        innerLine.AddPie(exclusionEllipse, startAngle, sweepAngle);<br />
        innerLine = this.removePointFromPath(innerLine, 0);<br />
        innerLine = this.changePathPointType(innerLine, innerLine.PointCount - 1, PathPointType.Bezier);<br />
        innerLine.Reverse();<br />
        outerLine.AddPath(innerLine, true);<br />
        outerLine.CloseFigure();<br />
      }<br />
<br />
      this.path = outerLine;<br />
    }<br />
    private GraphicsPath changePathPointType(GraphicsPath path, int pointIndex, PathPointType pointType) {<br />
      List<pointf> points = new List<pointf>();<br />
      List<byte> pointTypes = new List<byte>();<br />
<br />
      for (int index = 0; index < path.PointCount; index++) {<br />
        points.Add(path.PathPoints[index]);<br />
<br />
        if (index == pointIndex) {<br />
          pointTypes.Add((byte)pointType);<br />
        }<br />
        else {<br />
          pointTypes.Add(path.PathTypes[index]);<br />
        }<br />
      }<br />
      return new GraphicsPath(points.ToArray(), pointTypes.ToArray());<br />
    }<br />
<br />
    private GraphicsPath removePointFromPath(GraphicsPath path, int removeIndex) {<br />
      List<pointf> points = new List<pointf>();<br />
      List<byte> pointTypes = new List<byte>();<br />
<br />
      for (int index = 0; index < path.PointCount; index++) {<br />
        if (index != removeIndex) {<br />
          points.Add(path.PathPoints[index]);<br />
          pointTypes.Add(path.PathTypes[index]);<br />
        }<br />
      }<br />
      return new GraphicsPath(points.ToArray(), pointTypes.ToArray());<br />
    }<br />
<br />
    #region IDisposable Members<br />
<br />
    public void Dispose() {<br />
      if (this.path != null) {<br />
        this.path.Dispose();<br />
      }<br />
    }<br />
<br />
    #endregion<br />
  }<br />
</byte></byte></pointf></pointf></byte></byte></pointf></pointf>

Christian Graus wrote:

Well, he asked in three forums, and finally got an answer

 private void tbScroll(object sender, EventArgs e)<br />
        {<br />
            TextBox tb = (TextBox)sender;<br />
            Size tS = TextRenderer.MeasureText(tb.Text, tb.Font);<br />
            bool Hsb = tb.ClientSize.Height < tS.Height + int.Parse(tb.Font.Size);<br />
            bool Vsb = tb.ClientSize.Width < tS.Width;<br />
<br />
<br />
            if (Hsb && Vsb)<br />
            {<br />
                tb.ScrollBars = ScrollBars.Both;<br />
            }<br />
            else if (!Hsb && !Vsb)<br />
            {<br />
                tb.ScrollBars = ScrollBars.None;<br />
            }<br />
            else if (Hsb && !Vsb)<br />
            {<br />
                tb.ScrollBars = ScrollBars.Vertical;<br />
            }<br />
            else if (!Hsb && Vsb)<br />
            {<br />
                tb.ScrollBars = ScrollBars.Horizontal;<br />
            }<br />
<br />
            sender = (object)tb;<br />
        }