private void FormParent_Load(object sender, EventArgs e) { formHeThong fm = new formHeThong(); fm.MdiParent = this; fm.Show(); }
private void button2_Click(object sender, EventArgs e) { this.Close(); Form fm = new formHeThong(); fm.Show(); }
private void HIDE() { formHeThong fm = new formHeThong(); fm.Hide(); }