Webstringgrid auto size

WEB TMS WEB Core
2

On WebResponsiveGridPanel3LayoutChange can I get the number of Columns or if fr1 Or fr1 fr1

so I can use

        WebStringGridRates.ColWidths[0] := Round(WebResponsiveGridPanel3.Width / 3) ;
        WebStringGridRates.ColWidths[1] := Round(WebResponsiveGridPanel3.Width / 3) ;
        WebStringGridRates.ColWidths[2] := Round(WebResponsiveGridPanel3.Width / 3) ;