C/C++ program to copy dll into system32

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I have developed a win32 console applicaion using VS-2010. The application needs some dll files to be present in system32 in order to run. So my plan is to copy the required dll files into system 32, before running the application. I tried "CopyFile" to copy the dlls, but getting the error- "Access Denied". Looking for suggestions.

Posted 4-Jun-15 3:24am

Shrinivas Kattimani

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Sergey Alexandrovich Kryukov 4-Jun-15 9:44am

Why trying to do such a nasty thing?
—SA

Shrinivas Kattimani 4-Jun-15 23:45pm

It is because, when i distribute the exe, users should not take the burden of searching the required dlls and then placing it in the system directory.

Sergey Alexandrovich Kryukov 5-Jun-15 0:24am

Who suggested you to create a burden for the users? What are you even talking about?
You got two reasonable answers which create no burden, unlike what you are trying to do. Are you going to accept them?
—SA

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Jochen Arndt · Answer 1 · 2015-06-04T03:44:00

Solution 1

It is not recommended to install application specific DLLs to the Windows system directory. Just copy the DLL's to the same directory where your application is stored. That is the first directory where an application looks for required DLL's.

Posted 4-Jun-15 3:44am

Jochen Arndt

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Sergey Alexandrovich Kryukov 4-Jun-15 9:48am

Sure, a 5.
See also Solution 2 for some more detail.
—SA

Sergey Alexandrovich Kryukov · Answer 2 · 2015-06-04T03:52:00

Apparently, access is denied. The system tries to protect itself and their users from the nasty things you are trying to do. I just wonder if you devised some steps to remove the DLL if you can copy it. You could create some installation package and run it as administrator, but it would make the problem even nastier :-(.

This is not a legitimate way of deploying applications. If the DLL is used in your own application, nothing prevents you from having it in the same directory where your other executable files are. If you want to develop a system where you have several products reusing the same DLL, you still can keep them in the same executable directory or place them in sub-directories. You still can load the DLL from a parent directory. There are many other possibilities for non-intrusive deployment schema.

See also:
http://en.wikipedia.org/wiki/DLL_Hell[^],
https://msdn.microsoft.com/en-us/library/ms973843.aspx[^],
https://msdn.microsoft.com/en-us/library/ms973843.aspx[^],
http://en.wikipedia.org/wiki/Dependency_hell[^],
http://en.wikipedia.org/wiki/Portable_application[^].

—SA