private void btnQLHĐ_Click(object sender, EventArgs e) { QuanlyHoadon quanlyHoadon = new QuanlyHoadon(); quanlyHoadon.Show(); }
private void invoicesToolStripMenuItem_Click(object sender, EventArgs e) { QuanlyHoadon quanlyHoadon = new QuanlyHoadon(); addForm(quanlyHoadon); }