private void barButtonItem5_ItemClick(object sender, DevExpress.XtraBars.ItemClickEventArgs e)
{
HoanVi list = new HoanVi();
panelMain.Controls.Clear();
list.Dock = DockStyle.Fill;
panelMain.Controls.Add(list);
list.Show();
}
private void button4_Click(object sender, EventArgs e)
{
HoanVi list = new HoanVi();
panelMain.Controls.Clear();
list.Dock = DockStyle.Fill;
panelMain.Controls.Add(list);
list.Show();
}