public static MDIChildFormCustomers CreateOrSelectForm(Form mdiParent)
{
if (mdiForm == null)
{
mdiForm = new MDIChildFormCustomers();
}
mdiForm.MdiParent = mdiParent;
mdiForm.Show();
mdiForm.BringToFront();
return(mdiForm);
}
private void MiCustomers_Click(object sender, EventArgs e)
{
MDIChildFormCustomers.CreateOrSelectForm(this);
}
private void MDIChildFormCustomers_FormClosed(object sender, FormClosedEventArgs e)
{
mdiForm = null;
}