private void stockToolStripMenuItem_Click(object sender, EventArgs e)
{
PStock pro1 = new PStock();
pro1.MdiParent = this;
pro1.Show();
}
public StockMain()
{
InitializeComponent();
//load stock list at start
PStock pro1 = new PStock();
pro1.MdiParent = this;
pro1.Show();
}