Create Free Text Invoice in AX using X++

static void CreateFreeTextInvoice(Args _args)
{
    CustInvoiceTable    custInvoiceTable;
    CustInvoiceLine     custInvoiceLine;
    CustTable           custTable;
    CustPostInvoice     custPostInvoice;
    LineNum             lineNum;
    ;

    custTable = CustTable::find('******');
    custInvoiceTable.clear();
    custInvoiceTable.initFromCustTable(custTable);
    custInvoiceTable.insert();

    custInvoiceLine.clear();
    custInvoiceLine.initValue();
    custInvoiceLine.LedgerDimension =  123456;
    custInvoiceLine.initFromCustInvoiceTable(custInvoiceTable);
    custInvoiceLine.AmountCur = 101.00;
    custInvoiceLine.Description = "Test";
    custInvoiceLine.TaxItemGroup = "";
    custInvoiceLine.ParentRecId = custInvoiceTable.RecId;

    if(!lineNum)
        lineNum = CustInvoiceLine::lastLineNum_W(custInvoiceLine.ParentRecId);

    lineNum += 1;
    custInvoiceLine.LineNum = lineNum;
    custInvoiceLine.insert();

    custPostInvoice = new CustPostInvoice(custInvoiceTable);
    custPostInvoice.run();
}