private void btnLiberarOC_Click(object sender, EventArgs e)
{
FrmLiberarOC loc = new FrmLiberarOC();
loc.MdiParent = this;
OpenSubForm(loc);
}
private void ToolliberarOC_Click(object sender, EventArgs e)
{
FrmLiberarOC frm = new FrmLiberarOC();
frm.MdiParent = this;
OpenSubForm(frm);
}