private void buttonItem10_Click(object sender, EventArgs e) { HoaDonNhap hdn = new HoaDonNhap(); hdn.MdiParent = this; hdn.Show(); // this.Hide(); }
private void hóaĐơnNhậpToolStripMenuItem_Click(object sender, EventArgs e) { HoaDonNhap frm = new HoaDonNhap(); frm.MdiParent = this; frm.Show(); }