late binding

[Andy]

I don't fully understand the concept of late and early binding. I recently started using option strict and my code fell apart arrgh!

I fixed all of my errors except four of them and here is a sample of what I have left:

Private Sub tab_25_btnClearAll_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) _
    Handles tab_25_btnClearAll.Click
        'Purpose : Clears the CU tabpage
 
        Try
            Client.ClearTab(sender.parent)
            tab_25_optNo.Checked = True
 
        Catch ex As Exception
            ErrorMessage(ex.Message)
 
        End Try
    End Sub

the error is "option strict disallows late binding' and it highlights the "sender.parent" section. what can I do to correct this?