private void bt_quanli_vanbang_Click(object sender, EventArgs e) { CapVanBang f = new CapVanBang(); this.Visible = false; f.ShowDialog(); }
private void danhSáchCấpChứngChỉToolStripMenuItem_Click(object sender, EventArgs e) { CapVanBang f = new CapVanBang(); this.Visible = false; f.ShowDialog(); }