private void addAux(String name, String descrip, String key, int image) {
var father = tv_formulas.Nodes[C_KEY_SYSVARS].Nodes[key];
var item = father.Nodes.Add(name);
item.ImageIndex = image;
item.SelectedImageIndex = item.ImageIndex;
if (descrip != "")
{
item.Text = descrip + " ( "+ name + " )";
}
var info = "";
info = cUtil.setInfoString(info, C_FUNDESCRIP, descrip);
info = cUtil.setInfoString(info, C_FUNNAME, name);
info = cUtil.setInfoString(info, C_ISDBFIELDORLABEL, "1");
item.Tag = info;
}