vc知识库文章 - vc中基于 windows 的精确定时（VC knowledge base article - precise timing based on windows in VC）.doc

vc知识库文章 - vc中基于 windows 的精确定时（VC knowledge base article - precise timing based on windows in VC） VC knowledge base article - precise timing based on Windows in VC :: home page, documentation center, online magazine, WIN32, API[, online magazine, thirty-seventh issue.] This site is especially recommended: Skin++ general interface controls (Skin++ 2 released in November 1, 2005, the site updated!) product Characteristic： Support for multiple development languages (VC++, VB, C#, PowerBuilder, C++Builder, Delphi, E, etc.) The interface and business logic are thoroughly separated, saving development and maintenance time, and supporting Windows platforms, including Windows98/NT4/2000/XP/2003 The skin thoroughly, including the standard controls, common dialog box, support for third party control of the skin, provide convenient design tools, can design their own skin. [details are requested here.] The original document for this [23101] intermediate readers have read the document code tool Precise timing based on Windows in VC You Zhiyu, Institute of Opto electronics, Chinese Academy of Sciences Sample project Download In the industrial production control system, there are many operations that need to be completed in time. For example, the current time is displayed on time, and the progress bar on the screen is refreshed on time The machine sends commands and transmits data to the lower computer regularly. Especially in the real-time control system and data acquisition system which requires higher control performance, more precise timing operation is needed. As we all know, Windows is a message based system, and the execution of any event is done by sending and receiving messages. This creates problems such as when a computers CPU is occupied by a process or when the system resource is tight, it is sent to the message queue Messages are temporarily suspended and cannot be processed in real time. Therefore, you cannot simply initiate a timing requirement through the Windows m