Opening a Recordset from a query

[gbnz]

Okay here is what I would like to do...I have an unbound form that has a combobox on it. It's recordsource points to a query. What I would like to code is some first, next, previous and last buttons without using "send keys". So in other words when I press "Next" button I would want it to open the combobox's recordsource query, select the next record and then have that record display in the combobox. Could any one get me started with this?
I have searched and tried some things but to no avail.

Thank you in advance