Hallo Elmar Knoerzer,

> Hi,
> it's easy to save and load queries FieldIndex and FieldDisplayWidth
> values with commatext.
>
> Now i like to make a descendant of TIB_Query to do this automatically.

take a look to DoBeforeOpen() and DoBeforeClose() of TIB_Query;

I subclassed TIB_Query and TIB_Connection and introduced events
TIBP_Connection.OnBeforeIBPQueryOpen and
TIBP_Connection.OnBeforeIBPQueryClose to load and save settings.

HTH.

--
Andreas