ArcObjects Library Reference (Editor)

IEditProperties.SketchVertexSymbol Property

[Visual Basic .NET]
Public Property SketchVertexSymbol As IMarkerSymbol

[C#]
public IMarkerSymbol SketchVertexSymbol {get; set;}

Available with ArcGIS Desktop.

Use this property to change the symbology of the vertices in the edit sketch. Edit sketch vertices are drawn in green by default.

[C#]

This sample assums you have a reference to IApplication from the
OnCreate hook parameter (IApplication app = hook).

public void ChangeVertexSymbol()
  {
    IEditor vEditor;
    vEditor = app.FindExtensionByName("ESRI Object Editor") as IEditor;
    IEditProperties editProperties;
    editProperties = vEditor as IEditProperties;

    IRgbColor vertexColor = new RgbColorClass();
    vertexColor.Green = 255;
    IMarkerSymbol markerSymbol = new SimpleMarkerSymbolClass();
    markerSymbol.Color = vertexColor;
    markerSymbol.Size = 3;
    editProperties.SketchVertexSymbol = markerSymbol;
  }