Windows Socket 2.0 32-Bit DLL Fix for RAD Studio 10.2.2 and above

Introduction

When launch an application built with runtime packages compiled by RAD Studio 10.2 update 2 in Windows XP, an error prompt

The procedure entry point inet_pton could not be located in the dynamic link library ws2_32.dll.

The application works fine from Windows Vista onwards.

As stated in InetPton function:

The InetPton function is supported on Windows Vista and later.

RAD Studio 10.2 update 2 has a new update in unit Windows.WinSock2.pas:

function inet_pton; external ws2_32 name 'inet_pton';

The function is bind statically when application was launch. There is no way to patch the source code easily. A quick workaround solution is built the application as single executable file instead of runtime packages.

Solution: Deploy a proxy DLL to original WS2_32.dll

This project attempt to define proxy functions to all exported functions of original Windows XP's WS2_32.dll including inet_pton that was missing in Windows XP's WS2_32.dll. It tricks the Windows XP application process to think that inet_pton is available and not prompting any errors.

Please note that the DLL shall deploy to Windows XP only.