private void inDanhSáchẢnhToolStripMenuItem_Click(object sender, EventArgs e) { if (!CheckExitsFrom("FrmDsAnh")) { FrmDsAnh fm = new FrmDsAnh(); fm.MdiParent = this; fm.Show(); } else ActiveChildForm("FrmDsAnh"); }
private void button1_Click(object sender, EventArgs e) { FrmDsAnh f = new FrmDsAnh(); f.Show(); }