If you're looking for a manual method, open query, chose from menu: File, Export. Choose Text Files as type, and give destination filename. Click Save, and Export Wizard begins (Access 2000). If you're looking for a more automated method to use in a macro, or VBA code (preferred), then look at the TransferText method. VBA basic command is:
docmd.TransferText acExportDelim,,"qryName","DestinationFileName.csv",true
Ken