private void enrolledSubjectsToolStripMenuItem_Click(object sender, EventArgs e) { if (EnrolledSubjectsParameters == null) { EnrolledSubjectsParameters = new frmEnrolledSubjectsParameters(); } else { if (EnrolledSubjectsParameters.Created == false) { EnrolledSubjectsParameters = new frmEnrolledSubjectsParameters(); } } EnrolledSubjectsParameters.MdiParent = this; EnrolledSubjectsParameters.Show(); EnrolledSubjectsParameters.Activate(); }