private void BackButton_Click(object sender, EventArgs e)
{
Form quanlydausach = new QuanLyDauSach();
quanlydausach.TopLevel = false;
quanlydausach.Dock = DockStyle.Fill;
Backround_Panel.Controls.Add(quanlydausach);
Backround_Panel.Tag = quanlydausach;
quanlydausach.BringToFront();
quanlydausach.Show();
}
private void iconBt_Sach_Click(object sender, EventArgs e)
{
ActivateButton(sender);
//ActivateButton(sender);
//OpenChildForm(new QuanLyDauSach());
panelDesktop.Controls.Clear();
Form quanLydausach = new QuanLyDauSach();
quanLydausach.TopLevel = false;
panelDesktop.Controls.Add(quanLydausach);
quanLydausach.Dock = DockStyle.Fill;
//Backround_Panel.Tag = quanlycuonsach;
//quanlycuonsach.BringToFront();
quanLydausach.Show();
}