public XSSFChildAnchor(int x, int y, int cx, int cy) { t2d = new NPOI.OpenXmlFormats.Dml.Spreadsheet.CT_Transform2D(); CT_Point2D off = t2d.AddNewOff(); CT_PositiveSize2D ext = t2d.AddNewExt(); off.x = (x); off.y = (y); ext.cx = (Math.Abs(cx - x)); ext.cy = (Math.Abs(cy - y)); if (x > cx) t2d.flipH = (true); if (y > cy) t2d.flipV = (true); }