which item was checked/unchecked in checkboxlist

[Mydatafactory]

In a grid I have a checkboxlist. I can retrieve the selectedvalue, but, in order to insert/update/delete the selectedvalue in a datatable, I would like to retrieve which item of a checkboxlist has been checked or unchecked. I think it's a tiny issue, but I keep struggling with it, despite my search on the forum and the internet.

	Protected Sub chkTasks_CheckedChanged(ByVal sender As Object, ByVal e As System.EventArgs)
	Dim Today As Date
	Today = Now()
	Dim chkBox As CheckBoxList = CType(sender, CheckBoxList)
	Dim myPanel As Panel = CType(chkBox.Parent, Panel)
	Dim dataItem As GridDataItem = CType(myPanel.NamingContainer, GridDataItem)
	If chkBox.SelectedValue <> "" Then
	dataItem("FileName").Style("color") = "orange"
	Dim file As Integer = dataItem("FileId").Text
	Dim Task As Integer = chkBox.SelectedValue
	Dim Ext As RadComboBox = TryCast(dataItem.FindControl("cmbxExtension"), RadComboBox)
	Dim Extension As Integer = Int32.Parse(Ext.SelectedValue)
	Dim strSQL As String = _
	"INSERT INTO tblBewerkingToFile " & _
	"(FileId, BewerkingId, ExtensionFormat) " & _
	"VALUES " & _
	"(@FileId, @BewerkingId, @ExtensionFormat)"
	Dim Command As New SqlCommand(strSQL)
	Command.Parameters.AddWithValue("@FileId", file)
	Command.Parameters.AddWithValue("@BewerkingId", Task)
	Command.Parameters.AddWithValue("@ExtensionFormat", Extension)
	DBPortal.Execute(Command)
	End If
	Dim previewControl As Control = FindPageControl("previewControl")
	Dim NoResults As Label = previewControl.FindControl("lblNoChoice")
	NoResults.Visible = False
	Dim ValidResults As Repeater = previewControl.FindControl("rpValidBewerking")
	ValidResults.Visible = True
	End Sub

[Mydatafactory]

I've solved it myself after a walk with my dog. A little bit of fresh air makes the mind clearer.......