private void importCaseFromExcelToolStripMenuItem_Click(object sender, EventArgs e) { DailyCaseImportorFromExcel dailyCaseImportorFromExcel = new DailyCaseImportorFromExcel(); dailyCaseImportorFromExcel.WindowState = FormWindowState.Maximized; dailyCaseImportorFromExcel.MdiParent = this; dailyCaseImportorFromExcel.MaximizeBox = false; dailyCaseImportorFromExcel.MinimizeBox = false; dailyCaseImportorFromExcel.Show(); }