Need help supressing timeout in VB.net

I have a call to a database that can take hours to return the result set. (searches through over 1 million records)

If V.sSerialNum Is Nothing Then
s.FillAllErrByModel(t, V.sStartDate, V.sEndDate, V.sModel, V.sProduct)
end if

(t is the datatable and s is the adapter)

How do I supress the timeout, and where do I place the code to do this?

Thanks in advace for any help.