Marco,

thanks very much, works perfectly.

One more question:
When a dataset is in insert or edit state, how can I react upon insertion or
change of a value of a specific column?
What I want to do is this:
After the user has selected an article and how many of them, I want to call
a stored procedure to find the price for this combination (for example 1
costs $ 2,00, 2-5 costs $ 1,90 each ...) and insert it into the grid.

Florian