I am getting this error:

{"EditorControl property can only be set to a control that implements IProvidesEmbeddableEditor interface."}

Here is part of my code when I click on my 'Add' Button:

Dim uc As UltraCombo = New UltraCombo
uc.Name = "oUltraCombo"
uc.DropDownWidth = -1 ' fit the items in the drop down

With uc.DisplayLayout.Appearance
.FontData.Name = "Microsoft Sans Serif"
.FontData.SizeInPoints = 9.75
.FontData.Bold = DefaultableBoolean.False
.ForeColor = Color.Black
End With
uRow.Cells(oParam.DisplayName).EditorComponent = udd
uc.Value = uRow.Cells(oParam.DisplayName).Value

' Set the Style to DropDownValidate to trigger the data error event
' as that should limit entries to those available in the value list
uRow.Cells(oParam.DisplayName).Style = ColumnStyle.DropDownValidate

My datasource is a UltraDataSource

here is my code that builds it:

Private Sub createDataSource()
For Each oParam As Parameter In _parameters
uDataSource.Band.Columns.Add(oParam.DisplayName, GetType(String))
Next
uDataSource.Band.Columns.Add("SQLParam", GetType(String))
End Sub

I never add ultra controls dynamically before so I am not sure what to do.