开发背景：

近几年来，全国各级城市不同程度的出现一批制造、贩卖假发票不法分子，更有甚者制假分子竟然直接到街市兜售。这引起了各级纪委、监察部门、税务机关、公安部门等相关部门领导的高度重视。

开发目的：

为达到普及发票真伪判定，更大限度的抵制假发票漫延的目的。

本程序通过Socket接口将发票号，校验码等信息发往地税网关进行验证。

地税发票验证表,只要把发票的制轨码,发票号,校验码写入这个表(F_ZT为3),一两秒钟后再来取就行了:

create table dbo.Taxcheck(

F_ZGH varchar(25) null, 　　--制轨码

F_FPH varchar(10) null, 　　--发票号

F_JYM varchar(15) null, 　　--校验码

F_ZT char(1) null, 　　--状态(0:真,1:假,2:超时,3:未验证,4:已验证过)

)-Development Background:

In recent years, the city at all levels across different levels of the emergence of a manufacturing, selling fake invoices criminals, and some even went so far as counterfeiting elements to sell directly to the market. This has led to levels of discipline, supervision departments, tax authorities, public security departments and other relevant departments attach great importance to the leadership.

Development purposes:

　　 Determine the authenticity of the invoice in order to achieve universal access to a greater extent of resistance to the spread of false invoices purpose.

This program will be through the Socket Interface invoice number, verification code and other information sent to the local tax gateway for verification.

Rent invoice verification form, as long as the rail system, code invoices, invoice number, verification code to write the table (F_ZT 3), and then to take a second or two on the line:

create table dbo.Taxcheck (

F_ZGH varchar (