I really recommend to use the UDT API:
Dim udt As UserDefinedTableController
Dim ds As DataSet = udt.GetDataSet(moduleid)
'Look Up the title of the "Created by Column
Dim dv As New DataView(ds.Tables(1), _
String.format("[{0}]='{1}'", "FieldType", "CreatedBy"), "", DataViewRowState.CurrentRows)
Dim titleOfCreatedByColumn = dv.Item(0)("FieldTitle")
'Filter Data
dv = New DataView(ds.Tables(0), _
String.format("[{0}_UDT_Original] = '{1}'", titleOfCreatedByColumn, Me.UserInfo.Username), _
"", DataViewRowState.CurrentRows)