private void btnQD_Click(object sender, EventArgs e)
{
frmThayDoiCacQuyDinh QD = new frmThayDoiCacQuyDinh();
QD.ShowDialog();
}
private void ThayDoiQuiDinhToolStripMenuItem_Click(object sender, EventArgs e)
{
frmThayDoiCacQuyDinh Child = new frmThayDoiCacQuyDinh();
Child.MdiParent = this;
Child.Show();
}
