Revit.SDK.Samples.NewHostedSweep.CS.EdgeFetchForm.InitializePreview C# (CSharp) Method

        private void InitializePreview()
        {
            m_centerMatrix = new Matrix(1, 0, 0, -1,
               (float)pictureBoxPreview.Width / 2.0f, (float)pictureBoxPreview.Height / 2.0f);
            this.KeyPreview = true;

            foreach (Autodesk.Revit.DB.Element elem in m_creationData.Creator.ElemGeomDic.Keys)
            {
                m_activeElem = elem;
                break;
            }
        }