Microsoft Windows library files: Difference between revisions

Revision as of 18:28, 21 July 2025

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=== UCRT ===

With Version 14.0 ([[Visual_Studio|Visual Studio 2015]]), most of the C/C++ runtime was moved into a new DLL, UCRTBASE.DLL, which conforms closely with C99.<ref name="upgrade your code">{{cite web | title=Upgrade your code to the Universal CRT | url=https://learn.microsoft.com/en-us/cpp/porting/upgrade-your-code-to-the-universal-crt?view=msvc-170 }}</ref> '''Universal C Run Time''' ('''UCRT''') from Windows 10 onwards become a component part of Windows,<ref name="upgrade your code" /> so every compiler (either non MS, like [[GNU_Compiler_Collection|GCC]] or [[Clang]]/[[LLVM]]) can link against UCRT.<ref>{{cite web | title=MSYS2 - Environments | url=https://www.msys2.org/docs/environments/ }}</ref> Additionally, C/C++ programs using UCRTBASE.DLL need to link against another new DLL, the Visual C++ Runtime. At Version 14.0, this was VCRUNTIME140.DLL.<ref>{{cite web | url=https://docslearn.microsoft.com/en-us/cpp/porting/binary-compat-2015-2017?view=msvc-170 | title=C++ binary compatibility 2015-2022 | date=1130 March 2024January 2025}}</ref> The name has the potential to change at future versions, but has not done so as far as of Version 17.0.

Source code for runtime libraries is included in Visual C++<ref>{{cite web | url=http://msdn.microsoft.com/en-us/library/aa296413(v=vs.60).aspx | title=Source Code for the C Run-Time Functions | date=15 September 2006 }}</ref> for reference and debugging (e.g. in <code>C:\Program Files\Microsoft Visual Studio 11.0\VC\crt\src</code>).