private void AdvanceButton_Click(object sender, EventArgs e)
{
//ForgroundPanel.Controls.Clear();
Form quanlycuonsach = new QuanLyCuonSach();
quanlycuonsach.TopLevel = false;
quanlycuonsach.Dock = DockStyle.Fill;
Backround_Panel.Controls.Add(quanlycuonsach);
Backround_Panel.Tag = quanlycuonsach;
quanlycuonsach.BringToFront();
quanlycuonsach.Show();
}
private void btShowCuonSach_Click(object sender, EventArgs e)
{
MaDS = txbMaDS.Text;
TenDS = txbTenDS.Text;
Form quanlycuonsach = new QuanLyCuonSach();
quanlycuonsach.TopLevel = false;
Backround_Panel.Controls.Add(quanlycuonsach);
quanlycuonsach.Dock = DockStyle.Fill;
Backround_Panel.Tag = quanlycuonsach;
quanlycuonsach.BringToFront();
quanlycuonsach.Show();
}