private void addBtn_Click(object sender, EventArgs e)
{
Add_PO add_po = new Add_PO();
add_po.Show();
add_po.previousform = this;
this.Hide();
}
private void reorderBtn_Click(object sender, EventArgs e)
{
Add_PO addpo = new Add_PO();
addpo.previousform = this;
selected_data.reorder = true;
this.Hide();
addpo.Show();
}