DSP, DSW, NCB, opt, CLW, PLG, and APS files are respectively stored in what stuff, what is the role?

DSP, DSW, NCB, opt, CLW, PLG, and APS files are respectively stored in what stuff, what is the role? From VC ide tips:
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The parameter file of the OPT project on the development environment. Such as the tool bar position and other information; . APS (appstudio file), Resource auxiliary file, binary format, usually don't worry about it. . The CLW classwizard information file is actually in the INI file format. If you are interested, please study it. sometimes the classwizard has a problem. You can manually modify the CLW file to solve the problem. if this file does not exist, you will be prompted to re-create it each time you use classwizard. . DSP (workflow studio project): A project file in the text format. If you are not familiar with it, Do not manually modify it. DSW (workflow studio workspace) is a workspace file. Other features are similar to those of DSP. . PLG is a compilation information file. The error and warning information files during compilation (actually an HTML file) are generally of little use. there is an option in tools-> options to control the generation of this file. . HPJ (help project) is the project for generating help files, which can be processed using microsfot help compiler. . MDP (Microsoft devstudio project) is an earlier version of the project file. To open this file, you will be prompted to convert it to a new DSP format. . BSc is used to browse project information. This file is required if source Brower is used. if you do not need this function, you can remove the generate browse info file in project options to speed up compilation. . Map is the image information record file of the execution file, unless you are very familiar with the underlying system, this file is generally not needed. . PCH (pre-compiled file) is a pre-compiled file, which can speed up compilation, but the file is very large. . PDB (Program database) recordsProgramSome related data and debugging information may be useful during debugging. . Exp is generated only when the DLL is compiled, and some information in the DLL file is recorded. It is generally useless. . NCB does not compile the browsing file (No compile browser ). You can delete this file when the Automatic completion function fails. It is automatically generated after build. This article is from the csdn blog. For more information, see the source: Http://blog.csdn.net/icycoffee/archive/2007/06/28/1670452.aspx