Getting data from a query to be a default value in a form

[cppiston]

Hello all, I am having difficulty getting data to beome a default value in a form. My Access database is as follows. I have one form, in which the control sorce is a table to store information in all the fields. I have three combo boxes that a query uses to get default data for the above mentioned form. See, the control source for the fields where I need the default data cannot change. How can I get that data from the query to be the default data in the fields, to intern be saved on the table. Also, the fields cannot be locked withe that default data, just incase the default data may change a litle periodically. Do I need an expression, if so, how? I don't know much about expressions. Also, should the query make a temp Table? Thanks in advance.