private void SearchButton_Click(object sender, RoutedEventArgs e)
{
string lName = SearchBox.Text;
//Sleep GUI to wait for results
SearchBox.IsReadOnly = true;
IndexBox.IsReadOnly = true;
GoButton.IsEnabled = false;
SearchButton.IsEnabled = false;
//Set delegate target function
SearchRequest sOp = AsyncSearchFunction;
//Set callback function to run when async task finishes running
AsyncCallback callback = this.OnSearchComplete;
//Begin async task, searching
sOp.BeginInvoke(lName, callback, null);
}