Find and access control in GridView OnRowEditing event in ASP.Net

hi

I have gridview in my page that users can edit their data in gridview below is code:

 <asp:GridView ID="GridView1" runat="server" CssClass="DGridView1"
        AutoGenerateColumns = "false" Font-Names = "Tahoma" 
        Font-Size = "9pt"
        HeaderStyle-BackColor = "#e0e0e0" 
        OnPageIndexChanging = "OnPaging" onrowediting="EditCustomer"
        onrowupdating="UpdateCustomer"  onrowcancelingedit="CancelEdit"
         GridLines = "Both" OnRowDataBound = "OnRowDataBound"
>

I define Lable in gridview that  I want when users click on edit  it show s some text in this lable so I wrote editcustomer metod like below:

  protected void EditCustomer(object sender, GridViewEditEventArgs e)
    {
        Label3.Text = "neda";
        GridView1.EditIndex = e.NewEditIndex;
        BindData();
        BindData1();
    }

but this error happen:

the name "lable3" doesn't exist in current context

I know becuse I define it in gridview it can't recognise but how I can solve it?

Best regards

Neda