pr2,
thanks very much for your input.
The sample database works great - it is just that my requirement needs a combo box which is linked to a query, with ALL as a choice.\\I have managed to find the following code - which does not work.
SELECT qryFindContract.ContractID, qryFindContract.StartDate, qryFindContract.EndDate, qryFindContract.OwnerName1
FROM qryFindContract UNION SELECT '(All)', null FROM qryFindContract
I get an error message about 'the number of columns in the two selected tables or queries of a union query do not match'.