Provided by: libsdl3-doc_3.2.8+ds-1_all 

NAME
SDL_PLATFORM_WIN32 - A preprocessor macro that is only defined if compiling for desktop Windows.
HEADER FILE
Defined in SDL3/SDL_platform_defines.h
SYNOPSIS
#include "SDL3/SDL.h" #define SDL_PLATFORM_WIN32 1
DESCRIPTION
Despite the "32", this also covers 64-bit Windows; as an informal convention, its system layer tends to still be referred to as "the Win32 API."
AVAILABILITY
This macro is available since SDL 3.2.0. Simple Directmedia Layer SDL 3.2.8 SDL_PLATFORM_WIN32(3)