private void LoadLib() {
bw.DoWork += new DoWorkEventHandler(bw_DoWork);
bw.WorkerReportsProgress = true;
bw.WorkerSupportsCancellation = true;
bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bw_RunWorkerCompleted);
pbProgress.Visible = true;
if (bw.IsBusy) {
bw.CancelAsync();
}
bw.RunWorkerAsync();
}