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Don Bradner

author of WWPlus, ImgViewer/16, and BirdData
http://www.redshift.com/~arcatpet

o Does anybody know the reason why CTL3DV2.DLL should be under
o \windows\system directory. All dll/vbx for my developed application
o are located under working directory and it's working well except
o CTL3DV2.DLL. Windows(WFW3.11) returns ERROR msg "This application uses
o CTL3DV2.DLL, which has not been correctoy installed." After ignored the
o  msg, the application starts to work correctly again. After I moved this
o dll to \windows\system directory.  The msg didn't appreared.

CTL3DV2.DLL is *designed* to give this error message if it's not in the
Windows system directory. The intent is to stop people from keeping the dll
in the application directory. This reduces the chance of your program being
stuck with the in-memory module of a non-compatible version of the dll in
another app's directory.

All shared dll and vbx files should be kept in the Windows system
directory. Only keep private dll and vbx files in the app directory.

David
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That was/is MS's attempt to not have the dll scattered all over.  That
is, if you package/use it in your program, you have to install it --
properly -- in the user's \windows\system directory.

George