Hi,

I am trying to create a custom server control that contains several
dropdownlists.  The control looks like this:

Dim pnlHeader As New Panel

Protected Overrides Sub RenderContents(ByVal writer as HtmlTextWriter)
    pnlHeader.RenderControl(writer)
End Sub

Public Sub Setup_Control()
           Dim table As New HtmlControls.HtmlTable
           table.Attributes.Add("style", "width:100%")
           pnlHeader.Controls.Add(table)

           Dim row As New HtmlControls.HtmlTableRow

           Dim cellLabel As New HtmlControls.HtmlTableCell
           cellLabel.Width = "60%"
           Dim lblProblems As New Label
           lblProblems.ID = "lbl" & Category.ProblemTypeId
           lblProblems.Text = "Choose Vendor for All " &
Category.ProblemType & " Problems."
           cellLabel.Controls.Add(lblProblems)

           Dim cellDDL As New HtmlControls.HtmlTableCell
           cellDDL.Width = "30%"
           Dim ddlAll As New DropDownList
           ddlAll.ID = "ddlVendorForAll" &
Category.ProblemTypeId.ToString()
           ddlAll.AutoPostBack = True
           Common.FillList(ddlAll, HeatMapData.GetVendors(PropertyId,
"[Choose a Vendor]"))
           cellDDL.Controls.Add(ddlAll)
           listDDL.Add(ddlAll)
           AddHandler ddlAll.SelectedIndexChanged, AddressOf
ddlAll_SelectedIndexChanged

           Dim cellImage As New HtmlControls.HtmlTableCell
           cellImage.Width = "9%"
           Dim imgExpand As New WebControls.Image
           imgExpand.ID = "imgExpand" &
Category.ProblemTypeId.ToString()
           imgExpand.ImageUrl = "~/images/icons/118.png"
           imgExpand.ToolTip = "View Details"

           Dim imgCollapse As New WebControls.Image
           imgCollapse.ID = "imgCollapse" &
Category.ProblemTypeId.ToString()
           imgCollapse.ImageUrl = "~/images/icons/116.png"
           imgCollapse.ToolTip = "Hide Details"
           imgCollapse.Attributes.Add("style", "display:none")

           cellImage.Controls.Add(imgExpand)
           cellImage.Controls.Add(imgCollapse)

           row.Controls.Add(cellLabel)
           row.Controls.Add(cellDDL)
           row.Controls.Add(cellImage)
           table.Rows.Add(row)

           pnlHeader.BackColor = Drawing.Color.FromArgb(255, 206,
204, 204)
End Sub

Protected Sub ddlAll_SelectedIndexChanged(ByVal sender As Object,
ByVal e As System.EventArgs)
   ....
End Sub

The control renders fine.  The problem I am having is that the
dynamically created dropdownlist (ddlAll) does not fire the
SelectedIndexChanged event.  What am I missing?

Thanks,
Jeremy