Sets or returns the width of the "Standard Column", in points (1/72 of an inch). This must be a value that when converted to character widths is between 0 - 255.

 public double StandardWidth{ get; set; }
Public Property StandardWidth() As Double

          //--- Get StandardWidth
          ws.StandardWidth = 100;

          //--- Set StandardWidth
          double colWidth = ws.StandardWidth;
        

          '--- Get StandardWidth
          ws.StandardWidth = 100

          '--- Set StandardWidth
          Dim colWidth As Double = ws.StandardWidth