private void nhaCungCâpToolStripMenuItem_Click(object sender, EventArgs e)
{
frmNhaCungCap frm = new frmNhaCungCap();
frm.Show();
}
private void menuItemNhaCungCap_Click(object sender, EventArgs e)
{
frmNhaCungCap frmNCC = new frmNhaCungCap();
frmNCC.ShowDialog();
}