private void AssociateToolStripItems()
        {
            var menuitems = new Dictionary<string, ToolStripItem>();
            {
                Action<ToolStripItemCollection> subfunc = null;
                subfunc = (items) =>
                {
                    foreach (ToolStripItem item in items)
                    {
                        if (item.Name.StartsWith("mi"))
                            menuitems[item.Name.Substring(2)] = item;
 
                        if (item is ToolStripDropDownItem)
                            subfunc((item as ToolStripDropDownItem).DropDownItems);
                    }
                };
 
                subfunc(menuStrip.Items);
            }
 
            foreach (ToolStripItem item in toolStrip.Items)
            {
                if (item.Name.StartsWith("btn"))
                {
                    var name = item.Name.Substring(3);
                    if (!menuitems.ContainsKey(name))
                        continue;
 
                    var mi = menuitems[name] as ToolStripMenuItem;
                    if (mi == null)
                        continue;
 
                    var btn = item as ToolStripButton;
                    if (btn == null)
                        continue;
 
                    mi.EnabledChanged += (s, e) => { btn.Enabled = mi.Enabled; };
                    mi.CheckStateChanged += (s, e) => { btn.CheckState = mi.CheckState; };
                }
            }
        }

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