private void button2_Click(object sender, EventArgs e)
{
salesorder s = new salesorder();
s.Show();
this.Hide();
}
private void button4_Click(object sender, EventArgs e)
{
button1.Visible = false;
button3.Visible = false;
MessageBox.Show("Approved Successfully");
salesorder s = new salesorder();
s.Show();
this.Hide();
}