Microsoft Activex Data Object 6.0 Library

Replace the old CRT library (libcmt.lib, libcmtd.lib, msvcrt.lib, msvcrtd.lib) with the equivalent refactored libraries. If you've set the project's Linker property Ignore All Default Libraries to Yes or you are using the /NODEFAULTLIB linker option on the command line, then you must update your list of libraries (in the Additional Dependencies property) to include the new, refactored libraries. If you are using the default project settings, then this change doesn't impact you since the linker will use the new default libraries automatically. The vcruntime library contains the compiler-related functionality such as exception handling, and intrinsics. The CRT Library has been refactored into a two different binaries: a Universal CRT (ucrtbase), which contains most of the standard functionality, and a VC Runtime Library (vcruntime). Visual Studio 2015 Conformance Changes C Runtime Library (CRT) General Changes Standard C++ and C++ Standard Library Breaking Changes Although these improvements aren't breaking changes like the ones discussed in this document, you may need to make changes to your source code to resolve these issues: For example, you might find new or different errors during your build, or even behavioral differences in code that previously built and seemed to run correctly. For more information, see Portability At ABI Boundaries.Īdditionally, ongoing improvements to compiler conformance can sometimes change how the compiler understands your existing source code. If you do write such code, then you must ensure that it works after you upgrade. You should never write code that depends on a particular layout for an object that isn't a COM interface or a POD object. For more information, see Potential Errors Passing CRT Objects Across DLL Boundaries.

Don't pass CRT (C Runtime) or C++ Standard Library (C++ Standard Library) types between binaries, including DLLs, compiled by using different versions of the compiler. Also, when you upgrade an EXE or DLL project, make sure to upgrade the libraries that it links to. To avoid run-time errors that are difficult to detect and diagnose, we recommend that you never statically link to binaries compiled by using a different version of the compiler.

Changes in the new version that cause such problems are known as breaking changes, and typically they're required by modifications in the C++ language standard, function signatures, or the layout of objects in memory.

When you upgrade to a new version of Visual Studio, you might encounter compilation and/or runtime errors in code that previously compiled and ran correctly. There are no binary breaking changes between Visual Studio 2015 and Visual Studio 2017.

Microsoft Activex Data Object 6.0 Library