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

NAME
SDL_MessageBoxData - MessageBox structure containing title, text, window, etc.
HEADER FILE
Defined in SDL3/SDL_messagebox.h
SYNOPSIS
#include "SDL3/SDL.h"
typedef struct SDL_MessageBoxData
{
SDL_MessageBoxFlags flags;
SDL_Window *window; /**< Parent window, can be NULL */
const char *title; /**< UTF-8 title */
const char *message; /**< UTF-8 message text */
int numbuttons;
const SDL_MessageBoxButtonData *buttons;
const SDL_MessageBoxColorScheme *colorScheme; /**< SDL_MessageBoxColorScheme, can be NULL to use system settings */
} SDL_MessageBoxData;
AVAILABILITY
This struct is available since SDL 3.2.0.
Simple Directmedia Layer SDL 3.2.8 SDL_MessageBoxData(3type)