public static ExportToExcel getInstance() { if (ventana == null) ventana = new ExportToExcel(); return ventana; }
private void ExportToExcel_FormClosed(object sender, FormClosedEventArgs e) { ventana = null; }
public static ExportToExcel getInstance() { if (ventana == null) ventana = new ExportToExcel(); return ventana; }
private void ExportToExcel_FormClosed(object sender, FormClosedEventArgs e) { ventana = null; }