用VB实现的Client。实现S7—PLC和计算机通信。遵照OPC协议实现 -VB Client. Achieving S7-PLC and computer communications. OPC compliance with the agreement achieved

这是一个使用vb编写的OPC远程读取服务器程序，程序写的很清楚，方便以后哦做OPC的同学参考-This is a vb prepared OPC remote read server program, the program written in very clear, to facilitate future to do OPC classmates reference

开源.net HMI 框架,框架包含AB，Opc等plc驱动和免费的桌面环境控件.-a free and “almost open-source” HMI framework written in VB.Net that offer some drivers for PLCs, and also offer free SCADA objects for winforms users.