Because:
// Component def
published
property SQL: TStrings read FSQL write SetQuery;
Now user code doesn't know if SQL is implemented using TStringList, or
another method (for instance, TListBox uses TListBoxStrings internally, but
exposes it consistently as TStrings).
> -----Original Message-----
> From: Neven MacEwan [SMTP:[EMAIL PROTECTED]]
> Sent: Tuesday, November 23, 1999 2:05 PM
> To: Multiple recipients of list delphi
> Subject: [DUG]: Why?
>
> Hiya All
>
> For no other reason than It intrigues me but does anyone know why the VCL
> does this (from TQuery)
>
> // Component Def
> private
> FSQL: TStrings;
>
> // consructor
>
> constructor TQuery.Create(AOwner: TComponent);
> begin
> inherited Create(AOwner);
> FSQL := TStringList.Create;
> TStringList(SQL).OnChange := QueryChanged;
> ....
>
> why declare as TStrings when you want a TStringList?
>
> A mystery to me
>
> Regards
> Neven
>
>
>
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