private void toolStripTim_Click(object sender, EventArgs e)
{
frmTimPhieuNhan tim = new frmTimPhieuNhan();
Point p = PointToScreen(toolStripTim.Bounds.Location);
p.X += toolStripTim.Width;
p.Y += toolStripTim.Height;
tim.Location = p;
tim.ShowDialog();
if (tim.DialogResult == DialogResult.OK)
{
ctrl.TimPhieuNhan(tim.cmbTimPhieuNhan.SelectedValue.ToString());
}
}
