Question on project files

I've found that many times my classview information will inexplicably not be accessible, or the auto-complete of object methods/paramters will go away..

There are project files like project.ncb and project.opt for example, that if I delete them and re-run VC++ 6.0, things come back.

I'm wondering which of the following files are re-created automatically, what they are for, and which ones I should never delete.. (Assum the project is called "project")

PROJECT.APS
project.dsp   (project, this I'm sure I should keep)
project.dsw  (workspace, this I think I should keep)
project.mak
PROJECT.ncb
PROJECT.opt
PROJECT.plg
project.reg


Thanks!
-paul

PMH4514Asked:
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SteHCommented:
To re-created the class view information delete the file .clw. When pressing Ctrl+W the next time a dialog will pop-up asking you whether the file should be recreated.

project.mak is a make file created from the project file. It can be re-created at any time from the project menu->Export make file.
project.opt is storing options for this project like lib files to include etc.. Shoud be kept unless you need to restore default state.
.ncb can be deleted: http://www.gamedev.net/community/forums/topic.asp?topic_id=180776
.plg is a HTML result of the last build.
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gkatzCommented:
class view will also not be available if the project is already open either on your computer or on another computer.
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SteHCommented:
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PMH4514Author Commented:
Thanks!
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PMH4514Author Commented:
>>To re-created the class view information delete the file .clw. When pressing Ctrl+W the next time a dialog will pop-up >>asking you whether the file should be recreated.

Actually this is what I had expected, but in many instances, doing so would not work.. it would recreate the CLW file, but the class view and auto-complete were still not available within the project.. which led me to start deleting some of those other files.
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