private void btnCTPhieuNhap_Click(object sender, EventArgs e)
{
frmCTPhieuNhap frm = new frmCTPhieuNhap();
frm.Show();
}
private void chiTiếtPhiếuNhậpToolStripMenuItem_Click_1(object sender, EventArgs e)
{
frmCTPhieuNhap frm = new frmCTPhieuNhap();
frm.ShowDialog();
}