// Chuyển form
private void btnMenu5_Click(object sender, EventArgs e)
{
this.Hide();
frmSets dlg = new frmSets();
dlg.ShowDialog();
this.Close();
}
// Chuyển form
private void button1_Click(object sender, EventArgs e)
{
this.Hide();
frmSets Setdlg = new frmSets();
Setdlg.ShowDialog();
this.Close();
}