private void button6_Click(object sender, EventArgs e)
        {
            salesentry abj = new salesentry();

            abj.Show();
            this.WindowState = FormWindowState.Minimized;
        }
        private void button2_Click(object sender, EventArgs e)
        {
            salesentry salesadd = new salesentry();

            salesadd.Show();
            this.Close();
        }
        private void button2_Click(object sender, EventArgs e)
        {

            salesentry salesadd = new salesentry();
            salesadd.Show();
            this.Close();

        }