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OPC cliet 例子 ntroduction This document, and the ZIP archive of which it is part, are intended to help give a brief introduction to OLE for Process Control (OPC) client programming using Borland Delphi. The ZIP file contains Delphi source code for a simple OPC client application. You will also need the Delphi conversion of the OPC custom interfaces, available separately from the Delphi page at OPC Programmers' Connection. The code has been confirmed to be compatible with with Delphi 3 to 7, and Delphi 2005/2006 for Win32.