public void SwitchTaskPane()
        {
            switch (LoadedType)
            {
            case fileType.DMC:
                tph.BeginCode(model_code_xrefDMC.Count - 1);
                break;

            case fileType.STL:
                tph.BeginCode(model_code_xrefSTL.Count - 1);
                break;

            default:
                break;
            }
        }