Question : How to run SELECT statement against DataSet object

I have created a DataSet object and loaded few tables into it (they come from different data sources). As there are relations between them, I also created appropriate Relations objects.
Now I would like to extract some data based on certain criteria. In other words, is it possible to run a SELECT statement against a DataSet object? (Or any other way how to extract desired data from this object?)

Note: filtering (if it's possible) is not the best way, as I need to preserve the DataSet object in its original state.

thanx a lot.
Darkriser

Answer : How to run SELECT statement against DataSet object

You can try select from one dataset to another. Something like that

 Private Sub FilterTable(ByVal sParam As String)
        Dim newDS As DataSet = ds.Clone()
        Dim r As DataRow
        Dim MyRows As DataRow() = ds.Tables("Test").Select("Country = '" & sParam & "'")

        For Each r In MyRows
            newDS.Tables("Test").ImportRow(r)
        Next
    End Sub