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Windows library search order (EXE/DLL/module) (via “The Old New Thing”) and max PATH length

Posted by jpluimers on 2013/08/27

From The Old New Thing:

Recall that the library search path searches directories in the following order:

  1. The directory containing the application EXE.
  2. The system32 directory.
  3. The system directory.
  4. The Windows directory.
  5. The current directory.
  6. The PATH.

Note that the PATH environment variable has a limited length, which can be impacted by the installation programs you use and the Windows versions you use.

To be on the safe side, use 1024 or 1920.

I found various limitations:


via: Your debugging code can be a security vulnerability: Loading optional debugging DLLs without a full path – The Old New Thing – Site Home – MSDN Blogs.

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