private void cancel_sales_Click(object sender, EventArgs e)
{
// Application.Exit();
this.Hide();
inventory inventory = new inventory();
inventory.Visible = true;
inventory.Enabled = true;
}
private void product_guidebutton_Click(object sender, EventArgs e)
{
inventory inventory = new inventory();
inventory.Show();
product_guidebutton.Visible = false;
cateoryguide.Visible = false;
productguide.Visible = false;
}