FindControl in FormView using C#

Hello. I am trying to integrate the CKFinder control with a CKEditor that is inside a FormView. I am using C# and I am not that familiar with it. Here is the code behind:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public partial class admin_Default2 : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        if (!IsPostBack)
             GridView1.DataBind();
    }

    protected void Button1_Click(object sender, EventArgs e)
    {
     FormView1.ChangeMode(FormViewMode.Insert);
    }

    protected override void OnLoad(EventArgs e)
    {
        CKFinder.FileBrowser _FileBrowser = new CKFinder.FileBrowser();
        _FileBrowser.BasePath = "/ckfinder";
        _FileBrowser.SetupCKEditor(CKEditorControl1);
    }
}

It tells me that CKEditorControl1 does not exist in the current context. I assume I have to use FindControl to do this, but I don't know how to do that in C#. Can someone help me with this? Thanks!