private void clientesToolStripMenuItem3_Click(object sender, EventArgs e)
{
if (formClientes == null)
{
formClientes = new formClientes();
formClientes.MdiParent = this;
formClientes.Show();
}
else if (formClientes.IsDisposed)
{
formClientes = new formClientes();
formClientes.MdiParent = this;
formClientes.Show();
}
else
{
formClientes.Activate();
}
}
