Modules & VBA :: Using Recordset Inside SQL Statement?

Is it possible to use recordsets inside an sql-statement how described in following example. the error message: access can't find the table or querydef.

Code:

public function useRS (RS_ext_1 as DAO.Recordset, RS_ext_2 as DAO.Recordset) as DAO.Recordset
dim sql_RS_int as string
dim RS_int as DAO.Recordset

sql_RS_int = "SELECT * FROM RS_ext_1, RS_ext_2 WHERE col1_ext1 = 1 and col1_ext2 = 5"
set RS_int = CurrentDB().OpenRecordset(sql_RS_int)
set useRS = RS_int.Clone

end function