TFloatField 等等组件是从那里添加的？？

很久没有写程序了，现在就像初学者一样
请教老师，下面这些组件在那里，我添加copy上去，出现
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Error
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Field F_AdoDataSet.OrdersShipVIA does not have a corresponding component. Remove the declaration?
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错误，我改怎么做，才不会有错误
OrdersOrderNo: TFloatField;
    OrdersCustNo: TFloatField;
    OrdersSaleDate: TDateField;
    OrdersShipDate: TDateField; 
    OrdersEmpNo: TIntegerField; 
    OrdersShipToContact: TWideStringField; 
    OrdersShipToAddr1: TWideStringField; 
    OrdersShipToAddr2: TWideStringField; 
    OrdersShipToCity: TWideStringField; 
    OrdersShipToState: TWideStringField; 
    OrdersShipToZip: TWideStringField; 
    OrdersShipToCountry: TWideStringField; 
    OrdersShipToPhone: TWideStringField; 
    OrdersShipVIA: TWideStringField; 
    OrdersPO: TWideStringField; 
    OrdersTerms: TWideStringField; 
    OrdersPaymentMethod: TWideStringField; 
    OrdersItemsTotal: TFloatField; 
    OrdersTaxRate: TFloatField;
    OrdersFreight: TFloatField;
    OrdersAmountPaid: TFloatField;