Set up an export specification that specifies the decimal format for the
field and then use that export spec in a macro (TransferText) or VBA code
(DoCmd.TransferText).
You set up your spec by starting to do the export manually, and when the
wizard window opens, click on the Advanced button at bottom left -- you then
can set all the export specification parameters and save the spec as
whatever name you want. Then cancel the export and use the spec name in one
of the above methods.