How do I correct FormActionHandler?

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VB

Here is my FormActionHandler code:

Public Shared Function DeleteVendor(ByVal oldVendor As Vendor, ByVal newVendor As Vendor) As Boolean
        Dim aServiceFactory As PayableAppServiceFactory = PayableAppServiceFactory.GetInstance()
        Dim aVendorService As VendorService = aServiceFactory.GetServiceInstance(PayableAppServiceFactory.SERVICE_NAME.Vendor)
        Return aVendorService.DeleteVendor(oldVendor, newVendor)
    End Function

Now, here is the code I'm generating an error which is pointing to the Form ActionHandler:

Private Sub btnDeleteVendor_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles btnDeleteVendor.Click
        Dim message As String
        message = "Confirm deletion vendor " & txtVendorID.Text & " : " & NameTextBox.Text & "?"
        If MessageBox.Show(message, "DELETE VENDOR", MessageBoxButtons.YesNo) = Windows.Forms.DialogResult.Yes Then
            Try
                If Not FormActionHandler.DeleteVendor(vendor) Then
'---------------------^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
                    MessageBox.Show("Vendor could not be deleted. Another user has updated or deleted that vendor.", _
                    "Database Error")
                    Me.GetVendor(vendor.VendorID)
                Else
                    MessageBox.Show("Vendor has been Deleted")
                    VendorBindingSource.Clear()
                End If
            Catch ex As Exception
                MessageBox.Show(ex.Message, ex.GetType.ToString)
            End Try
        End If
    End Sub
End Class

The line I've bolded marked with '-----^^^ is the line that's giving me an error. Could someone help me with this?^

Thank you!