在C++BUILDER中为什么不能处理SQL中的标签行(100分)

sqlstring =" if exists(select name from sysobjects where name='aaa' and type='P')
sqlstring =" begin
";
sqlstring =" drop procedure aaa";
sqlstring =" end";
ADOQuery1->Active=false;
ADOQuery1->Connection=ADOConnection1;
ADOQuery1->SQL->Clear();
ADOQuery1->SQL->Add(SqlString);
ADOQuery1->ExecSQL();
ADOQuery1->Active=false;
//上边执行没有问题
sqlstring =" create procedure aaa"
sqlstring +=" as"
sqlstring +=" declare @bbb int"
sqlstring +=" set @bbb=1"
sqlstring +=" meifeng:" 　//在C++Builder 中出错，在Sql中不出错
sqlstring +=" set @bbb=@bbb+1"
sqlstring +=" if @bbb<=10 "
sqlstring +=" goto meifeng"　
ADOQuery1->Active=false;
ADOQuery1->Connection=ADOConnection1;
ADOQuery1->SQL->Clear();
ADOQuery1->SQL->Add(SqlString);
ADOQuery1->ExecSQL();
ADOQuery1->Active=false;