>But if you don't store anything, wouldn't this be considered as NULL?
>If you have Table (ID,DATETIME), then
> Insert();
> FieldByName("ID")->AsInteger=2;
> Post();

Yes, thats true, but if I have allready stored a value in the field
and want to change it to NULL.

like:
Insert();
FieldByName("ID")->AsInteger=2;
FieldByName("DATETIME").Asdatetime= any valid date;
Post();

and then

update();
FieldByName("DATETIME").Asdatetime= should be NULL;
Post();

cu
Helmut