Conditionally run a backgroundworker

Question

I am trying to run a backgroundworker, but only when a certain radiobutton is checked . if it is unchecked then i want to cancel the backgroundworker - the moment when its checkstate changes.

I have tried including the chackstate as an argument of the backgroundworker runworkerAsync call and the put the code in an if statement but itlooks like the thread does not know that the checkstate has changed

  Private Sub OptionUpdate_CheckedChanged(sender As Object, e As EventArgs) Handles OptionUpdate.CheckedChanged
        If OptionUpdate.Checked = True Then
            BackgroundWorker1.RunWorkerAsync(OptionUpdate.Checked)
        Else
            UpdateOptionBox(False)
        End If
    End Sub

This is the code for my backgroundworker DoWork method

 Private Sub BackgroundWorker1_DoWork(sender As Object, e As DoWorkEventArgs) Handles BackgroundWorker1.DoWork
        Dim myOptionUpdateState As Boolean

        myOptionUpdateState = e.Argument

        If BackgroundWorker1.IsBusy Then
            If BackgroundWorker1.WorkerSupportsCancellation Then
                BackgroundWorker1.CancelAsync()
            End If
        End If

        If myOptionUpdateState = True Then

            SetControlTextProperty_ThreadSafe(RadLabel1, "")

            Dim myString As String
            myString = "Please enter the Fuel charge Rate to update rates..."

            For i As Integer = 0 To myString.Length

                If myOptionUpdateState = False Then
                    BackgroundWorker1.CancelAsync()
                End If

                SetControlTextProperty_ThreadSafe(RadLabel1, myString.Substring(0, i))

                Thread.Sleep(120)

                If i = myString.Length Then
                    i = 0
                End If

            Next

        End If
    End Sub

How can I make it that when the checkstate changes then the background worker will stop

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If you think it you can achieve it