private void formProgressor()
{
//if (frm.Handle == IntPtr.Zero)
// frm = new ProgressForm(this);
frm.BeginInvoke(new MethodInvoker(delegate
{
if (this.MainWindow != null)
{
frm.ShowDialog(this.MainWindow);
}
else
{
frm.ShowDialog();
}
}
));
}