private void SetFolder(string folder)
{
this.listBoxGraphics.BeginUpdate();
this.listBoxGraphics.Items.Clear();
this._folder = folder;
foreach (GameResource rsx in this._resources)
this.listBoxGraphics.Items.Add(rsx.Name);
this._resources.Insert(0, null);
this.listBoxGraphics.Items.Insert(0, "<None>");
this.listBoxGraphics.EndUpdate();
}