If you define a filter in the MailMerge Recipients dialog or its "advanced"
facility, Word actually "translates" your filter specifications into an SQL
SELECT statement. Precisely how it does it depends on which dialect of SQL
it thinks it needs to use. But toset up the filter in code,
a. find out the SQL that WOrd is using (e.g. look at the value of
ActiveDocument.MailMerge.DataSource.QueryString)
b. either set ActiveDocument.MailMerge.DataSource.QueryString to have the
value you need or
c. set the valuein a cal to OpenDataSource (you may have to do it this way
if you cannot use approach (b).