__declspec(dllexport) void **OPENSSL_Applink();
OPENSSL_Applink is application-side interface which provides a glue between OpenSSL BIO layer and Win32 compiler run-time environment. Even though it appears at application side, it's essentially OpenSSL private interface. For this reason application developers are not expected to implement it, but to compile provided module with compiler of their choice and link it into the target application. The referred module is available as applink.c, located alongside the public header files (only on the platforms where applicable).
Copyright 2004-2018 The OpenSSL Project Authors. All Rights Reserved.
Licensed under the OpenSSL license (the “License”). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <https://www.openssl.org/source/license.html>.