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<p>new DLL version. To work correctly, the DLL changes must maintain <a href="page.php?w=backward_compatibility">backward compatibility</a>.</p>

<p>Even the operating system can be upgraded since it is exposed to the applications via DLLs. System DLLs can be replaced so that the next time the applications run, they use the new system DLLs.</p>

<p><big> Memory management </big></p>
<p>In <a href="page.php?w=Windows_API">Windows API</a>, DLL files are organized into <a href="page.php?w=Memory_segmentation">sections</a>. Each section has its own set of attributes,</p><p>
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