如何在程序中捕获Sqlserver中触发器的错误

CREATE TRIGGER checkrightno_forcust ON [dbo].[B_Customer]
FOR INSERT, UPDATE
AS
--检查授权号重复性
if exists(select v.* from inserted v join b_customer t1 on t1.frightno=v.frightno
          where v.frightno<>'' and v.finterid<>t1.finterid)
   begin
        raiserror('授权号重复，请检查!',16,1)
   end


如何在程序中直接捕获“授权号重复，请检查!”错误，并提示“授权号重复，请检查”