private void btnHangNhap_Click(object sender, EventArgs e) { Form form = searchOpenedForm("HangNhapManagerForm"); if (form == null) { form = new HangNhapManagerForm(); } form.Show(); form.Activate(); }
private void hàngNhậpToolStripMenuItem_Click(object sender, EventArgs e) { Form form = searchOpenedForm("HangNhapManagerForm"); if (form == null) { form = new HangNhapManagerForm(); } form.MdiParent = this; form.Show(); form.Activate(); }