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