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IT技术ZmlsZS

工控行业一般VB语言用在哪些方面，要怎么学？n年前用VB做过几个不同形式的工控系统 。
1）VB很适合作上位机的用户界面（UI）
2）一般地，上位机与现场设备或现场控制设备之间，采用RS232C/485/422通信 。所以，掌握串行通信原理 ， 比如 ， 什么是同步传输 ， 什么是异步传输，什么是奇偶校验，什么是CRC校验，什么是面向字符（字节）的传输，什么是透明传输，等等，这些概念对构建一个上位系统非常重要 。对于VB6而言，就是掌握MSCOMM控件；对于VB.NET而言，掌握SerialPort
3）有的时候，上位机于现场设备之间的通信，采用特定的接口板块 。例如，在上位机PCI卡槽中插入特定功能的接口版 。VB通过操纵这些接口版，与设备通信 。通常，接口版制造商提供DLL形式的编程接口，VB调用这些DLL即可操纵这些接口版 。所以，需要掌握VB调用DLL的知识 。
4）工业以太网得到越来越多的应用，VB可以通过工业以太网操纵设备 。这需要掌握Socket编程 。对vb6而言，就是WinSock控件；对VB.NET就是SOCKET类
求滨崎步的全部演唱会的高清版下载去步吧找吧 有很多crcvb.net的
滨崎步所有演唱会永久保存下载地址 全RFcrcvb.net的
2000 concert tour vol.1
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2000 concert tour vol.2
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Countdown Live 2000-2001
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Dome Tour 2001
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Countdown Live 2001-2002
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Stadium TOUR 2002 A
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ARENA.TOUR.2002 .A
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Countdown Live 2002-2003
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A museum
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ARENA TOUR 2003-2004
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Countdown Live 04-05
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CDL 2005-2006
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ARENA TOUR 2006 A~(miss)understood~
Disc 1
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Disc 2
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Disc 3
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BEST of COUNTDOWN LIVE 2006-2007A
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ASIA.TOUR.2007.A.～Tour.of.Secret～
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CDL 2007-2008
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together when【best artist】
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Surreal【CDL 07-08】TS
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MIRRORCLE WORLD A NATION 08
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C语言转换为VB.NETOption Explicit On
Option Strict On
Imports System
Module Program
Sub Main()
Dim y,m,t As Integer
begin:
' 输入数据时一行一个
y=CInt(Console.ReadLine())
m=CInt(Console.ReadLine())
t=CInt(Console.ReadLine())
If y
200 Then
Console.WriteLine("ERROR")
goto begin
End If
pr(y,m,t)
Console.Write("Press any key to continue . . . ")
Console.ReadKey(True)
End Sub
Function pr(y As Integer,m As Integer,t As Integer) As Integer
Dim ye,[Me],i As Integer
ye=CInt((m t-2)/12 y)
[Me]=(m t-2) Mod 12 1
End If
End Function
Function mday(y As Integer,m As Integer) As Integer
Dim day As Integer()={0,31,28,31,30,31,30,31,31,30,31,30,31}
Dim ad As I
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