private void StockData_Click(object sender, EventArgs e)
{
Form childForm = new StockForm();
childForm.MdiParent = this;
childForm.Show();
}
private void ShowNewForm(object sender, EventArgs e)
{
Form childForm = new StockForm();
childForm.MdiParent = this;
//childForm.Text = "窗口 " + childFormNumber++;
childForm.Show();
}