>To add a dummy field to my recordset, do I have to use MyRecordset.Fields.Append method ?? If so, I get an error that says : Operation not allowed in this context

You cannot use this. This will generate a run-time error. You need to create it while querying the database (select *, '' as DUMMY from YourTable ...).

>I would also like you to precise me what you mean by initialising it while populating the grid...

Before setting the grid source property to your recordset, loop through your recordset and update your dummy field.