private void importDataFixeToolStripMenuItem_Click(object sender, EventArgs e) { if (fix == null || fix.IsDisposed) { fix = new Import_Data_Fix(); fix.MdiParent = this; fix.CodeSoc = CodeSoc; fix.RefSoc = idSociete; fix.NomSoc = NomSoc; fix.Show(); } else { fix.WindowState = FormWindowState.Maximized; fix.Activate(); } }