private void covarClick(object sender, System.EventArgs e) { if (covarForm.IsDisposed) { covarForm = new CovarianceForm(); } this.Cursor = Cursors.WaitCursor; fit.EvalCovarianceMatrix(); ResetErr(); if (CovarianceMatrix != null) { covarForm.Reset(CovarianceMatrix); if (covarForm.WindowState == FormWindowState.Minimized) { covarForm.WindowState = FormWindowState.Normal; } covarForm.Show(); covarForm.BringToFront(); } this.Cursor = Cursors.Arrow; }