private void loadStringList()
{
txtItem.Text = string.Empty;
lstItems.Items.Clear();
foreach (ScriptString ss in _qbItem.Strings)
lstItems.Items.Add(ss.Text);
bool hasStrings = (lstItems.Items.Count != 0);
if (hasStrings)
lstItems.SelectedIndex = 0;
lstItems.Enabled = hasStrings;
txtItem.Enabled = hasStrings;
btnSet.Enabled = hasStrings;
}