I'm trying to build a SQL String based on frmCriteria just like the book. As the book suggested, I wrote the following code for cmdApply_Click. But, nothing happens.
Can anyone help?

Private Sub cmdApply_Click()
Dim strSQL As String

If Not EntriesValid Then Exit Sub

 If Not BuildSQLString(strSQL) Then
   MsgBox "There was a problem building the SQL string"
   Exit Sub
End If

 MsgBox strSQL
 CurrentDb.QueryDefs("qryExample").SQL = strSQL
End Sub