private void InitSizes(int width, int height)
 {
     lock (lockThis){
         widths  = InitSizes(width, ColumnStyles.ToArray(), BorderSize);
         xpos    = InitPositions(widths, BorderSize);
         heights = InitSizes(height, RowStyles.ToArray(), BorderSize);
         ypos    = InitPositions(heights, BorderSize);
     }
 }