private void MM_service_Click(object sender, EventArgs e)
{
if (ms == null)
{
ms = new ManageService();
ms.MdiParent = this;
ms.FormClosed += new FormClosedEventHandler(Ms_FormClosed);
ms.Show();
}
else
{
ms.Activate();
}
}
private void Ms_FormClosed(object sender, FormClosedEventArgs e)
{
ms = null;
}