IEditProperties Interface

This sample assums you have a reference to IEditor from the
OnCreate method in the code (IEditor m_editor).

 private void ChangeSketchSymbol()
    {
      IEditProperties editProperties;
      editProperties = m_editor as IEditProperties;
      ILineSymbol lineSymbol = new SimpleLineSymbol();
      IRgbColor sketchColor = new RgbColorClass();
      sketchColor.Red = 255;
      lineSymbol.Color = sketchColor;
      editProperties.SketchSymbol = lineSymbol;
    }

This sample assums you have a reference to IEditor from the 
OnCreate method in the code (Private m_editor as IEditor).

Private Sub ChangeSketchSymbol()
  Dim editProperties As IEditProperties
  editProperties = m_editor
  Dim lineSymbol As ILineSymbol
  Dim rColor As IRgbColor

  'Change the sketch symbol to use a red line
  lineSymbol = New SimpleLineSymbol
  rColor = New RgbColor
  rColor.Red = 255
  lineSymbol.Color = rColor
  editProperties.SketchSymbol = lineSymbol
End Sub