private void Button_Supplier_Click(object sender, EventArgs e)
{
this.Hide();
Modify_Supplier form_Barang = new Modify_Supplier();
form_Barang.Show();
}
private void Form1_Load(object sender, EventArgs e)
{
Modify_Barang form_Barang = new Modify_Barang();
Modify_Staff form_Staff = new Modify_Staff();
Modify_Supplier form_Supplier = new Modify_Supplier();
Transaction_Manager form_Transaction = new Transaction_Manager();
form_Barang.Close();
form_Staff.Close();
form_Supplier.Close();
form_Transaction.Close();
}