private void button7_Click(object sender, EventArgs e)
{
MessageBox.Show("Hello đm m");
FrmThongTin thongTin = new FrmThongTin(sqlConnection);
thongTin.Show();
}
private void thôngTinToolStripMenuItem_Click(object sender, EventArgs e)
{
FrmThongTin frmThongTin = new FrmThongTin(sqlConnection);
frmThongTin.Show();
}
