private void HìnhThứcĐảmBảo_Click(object sender, EventArgs e) { if (HTDamBaofrm == null || HTDamBaofrm.IsDisposed) { HTDamBaofrm = new frmHTDamBao(); HTDamBaofrm.MdiParent = this; HTDamBaofrm.Show(); } else { HTDamBaofrm.Activate(); } }
private void btnThemhtdambao_Click(object sender, EventArgs e) { frmHTDamBao HTDB = new frmHTDamBao(); HTDB.ShowDialog(); }