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ParseSQL converts :paramname syntax into ?. AnsiString is reference counted.
S is changed because of S = ... newS has changed because it references the
same string. Try add

newS.Unique();

before calling ParseSQL().

//------------------------------------------
Regards,
Vassiliev V. V.
http://www.managed-vcl.com - using .Net objects in Delphi for Win32 +
ADO.Net
http://www.oledbdirect.com - The fastest way to access MS SQL Server,
MS Jet (Access) and Interbase (through OLEDB)

"Niyazi Unugur" <unugurn@kentkart.com.tr> �������/�������� � ��������
���������: news:41a1f912$1@newsgroups.borland.com...
>
> As described in help;
>
> AnsiString __fastcall ParseSQL(AnsiString SQL, bool DoCreate);
>
> TParameters ParseSQL has the above syntax;
>
> Below is my sample code for testing
>
> ...
>
> AnsiString S = "SELECT * FROM tableA  WHERE p1 = :param1 and p2 = :param2
and p3 = :param3";
> AnsiString newS = S;
>
> Query->Parameters->ParseSQL(S, true);
>
> please debug values S and newS
>
> you will see both S and newS has "? ? ?" values;
>
> How S can changed?
> How newS changes !!!!
>
> What is the problem?
>
> Thanks,
>
> Niyazi Unugur
>