I'm new to this, so be kind and answer in plain English please. :)

I have written a user-defined function that connects to an Access db
and performs a query, returning a value to a cell in Excel. It works
great. But I have discovered that I need to do an initial query first
and, depending on its results, have my function perform one of several
possible second queries.

My problem is I don't quite understand the mechanics of how the
connection to the db works. The code I am using, after building my
query and assigning it to the string variable SQLstr is:

conn.Open "Provider=Microsoft.Jet.OLEDB.4.0;" & _
"Data Source=G:\DB\CMdb.mdb;"
rst.Open SQLstr, conn
DataFetch = rst.Fields(0).Value

(DataFetch is the function's name, and the query always returns one and
only one value)

What do I need to do if I want to establish the connection, build a
SQLstr and perform a query with it, then build a second SQLstr and
perform a second query with it (the results of which will become the
function's ret val, as above)? Do I need to re-establish a connection
for each query, or will a connection early on in the function stay open
until the end? I hope I am being specific enough here. Thanks.