[サンプル：form_size1]

Form form_size1 {
   …
    Spread Spread1 {
    X = 43;
    Y = 75;
    
    /*常にFormの大きさを参照する*/
    Width &= Form_size1.Width - 70;
    Height &= Form_size1.Height - 90;
    
    SpreadRow SpreadRow1[] {
      /*SpreadのHeightから、SpreadRowのHeightを算出*/
      Height &= (^.Height -20) / 5;
      SpreadColumn SpreadColumn1 {
        Title = "品名";
        /*SpreadのWidthから、SpreadColumnのWidthを算出*/
        Width &= (^.^.Width - 30) / 3;
      }
      SpreadColumn SpreadColumn2 {
        Title = "値段";
        Width &= (^.^.Width - 30) / 3;
      }
      SpreadColumn SpreadColumn3 {
        Title = "出荷先";
        Width &= (^.^.Width - 35) / 3;
      }
    }
  }
   …
}

[サンプル：form_size2]

Form Form_size2 {
   …
  Spread Spread1 {
    X = 43;
    Y = 75;
    Width = 332;
    Height = 122;
    
    SpreadRow SpreadRow1[] {
      Height = 20;
      SpreadColumn SpreadColumn1 {
        Title = "品名";
      }
      SpreadColumn SpreadColumn2 {
        Title = "値段";
      }
      SpreadColumn SpreadColumn3 {
        Title = "出荷先";
      }
    }
  }
}
Function OnWindowStateChanged ( e ){
  /*起きたのが最大化だった場合*/
  if(e.state == 2){
    form_size2.Spread1.Width = 996;
    form_size2.Spread1.Height = 366;
    form_size2.Spread1.SpreadRow1.Height = 69;
    form_size2.Spread1.SpreadRow1.SpreadColumn1.Width = 320;
    form_size2.Spread1.SpreadRow1.SpreadColumn2.Width = 320;
    form_size2.Spread1.SpreadRow1.SpreadColumn3.Width = 320;
  }else{
    form_size2.Spread1.Width = 332;
    form_size2.Spread1.Height = 122;
    form_size2.Spread1.SpreadRow1.Height = 20;
    form_size2.Spread1.SpreadRow1.SpreadColumn1.Width = 100;
    form_size2.Spread1.SpreadRow1.SpreadColumn2.Width = 100;
    form_size2.Spread1.SpreadRow1.SpreadColumn3.Width = 100;
  }
}