Help caputuring properties in dynamic controls on postback

I declared a placeholder on a web form and I add dropdownlists to it dynamically (dont know how many at any given time). How do I get the results out on the next postback? Am I missing an event to trap the values with? Every time I try (like in the post buttons click event, I am missing the selected values.)

HERE IS THE GENERATING CODE

For Each item As System.Web.UI.WebControls.ListItem In CheckBoxList1.Items
If item.Selected Then
Results1 += item.Value & ";"
Dim Name As New Label
Name.Text = item.Text & "<br>"
Dim CatLink As New DropDownList
CatLink.Items.Add("1")
CatLink.Items.Add("2")
CatLink.Items.Add("3")
CatLink.Items.Add("4")
CatLink.Items.Add("5")
CatLink.ID = item.Value
Me.PlaceHolderQ2.Controls.Add(Name)
End IF
Next item

HERE I AM TRYING TO READ THE VALUES


Dim myresults As String
For Each cont As Control In Me.PlaceHolderQ2.Controls
Try
'Dim drop As New DropDownList
myresults += CType(cont, DropDownList).SelectedValue & ";"
Catch ex As Exception

End Try

Next

In what event are you running the code you posted...

1) Are you using Page_Load? And are you checking for a IsPostback, so you don't recreate the controls and lose their events evertime the page posts back.