update bound textbox

Hi there,

I've searched and tried VBA and dMax but can't get anything to work. Googleing with no luck as well.

Using 2007-10 access. I have a table with fields "batch_prefix" (text) and "batch_suffix" (number).

In a form, I'm trying to have a after update property on a combobox for the prefix that updates the suffix textbox to the max + 1 for the relevant prefix.

The prefix is limited to another table's field but new prefixes will be added in time.

Any help would be great.

Cheers!