private void OpenFile(object sender, EventArgs e)
{
AddProduct ac = new AddProduct();
ac.MdiParent = this;
ac.WindowState = FormWindowState.Maximized;
//ac.StartPosition = FormStartPosition.CenterParent;
//ac.StartPosition = FormStartPosition.Manual;
//ac.Location = new Point(Location.X + (Width - ac.Width) / 2, Location.Y + (Height - ac.Height) / 2);
ac.Show();
}
private void button4_Click(object sender, EventArgs e)
{
AddProduct ac = new AddProduct();
ac.Show();
}