struct TTPOLYGONHEADER {

Structure TTPOLYGONHEADER

public struct TTPOLYGONHEADER

                            int polygonHeaderSize = Marshal.SizeOf(typeof(TTPOLYGONHEADER));

                                TTPOLYGONHEADER header = (TTPOLYGONHEADER)Marshal.PtrToStructure(new IntPtr(buffer.ToInt32()+index), typeof(TTPOLYGONHEADER));