private void OpenFile(object sender, EventArgs e)
{
Form childForm = new BrokerWindow();
childForm.MdiParent = this;
childForm.Text = "Window " + childFormNumber++;
childForm.Show();
}
private void BrokerToolStripMenuItem_Click(object sender, EventArgs e)
{
BrokerWindow childForm = new BrokerWindow();
childForm.MdiParent = this;
childForm.Text = childFormNumber.ToString();
childForm.Show();
}