Question : query on unbound text box producing strange characters and not numbers

I am trying to use an unbound form for a user to input some numbers which are then used in a query.  I have set the format on the text box to general number and when I get the result in the query I get what looks like either boxes or chinese lettering.  I have done this kind of thing loads of times and can't see what I am doing wrong - what am I missing or have I got corruption problems?  Very frustrated!

Answer : query on unbound text box producing strange characters and not numbers

Our posts crossed.

Try this;
SELECT clng(Forms!frmTest!txtCostClasses) AS Expr1, clng(Forms!frmTest!txtMembership) AS Expr2, (clng(Forms!frmTest!txtCostClasses) + clng(Forms!frmTest!txtMembership) ) as AddedTogether