* Fill Tree Combo
*/
private void preInit() throws Exception
{
Properties ctx = getCtx();
Language language = Language.getLoginLanguage(); // Base Language
MLookup m_fieldProduct = MLookupFactory.get(ctx, m_WindowNo,
MColumn.getColumn_ID(MProduct.Table_Name, "M_Product_ID"),
DisplayType.Search, language, MProduct.COLUMNNAME_M_Product_ID, 0, false,
" M_Product.IsSummary = 'N'");
fieldProduct = new VLookup ("M_Product_ID", false, false, true, m_fieldProduct) {