SDL Wiki
(This is the documentation for SDL3, which is under heavy development and the API is changing! SDL2 is the current stable version!)


Display a simple modal message box.


int SDL_ShowSimpleMessageBox(Uint32 flags, const char *title, const char *message, SDL_Window *window);

Function Parameters

flags an SDL_MessageBoxFlags value
title UTF-8 title text
message UTF-8 message text
window the parent window, or NULL for no parent

Return Value

Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.


If your needs aren't complex, this function is preferred over SDL_ShowMessageBox.

flags may be any of the following:

This function should be called on the thread that created the parent window, or on the main thread if the messagebox has no parent. It will block execution of that thread until the user clicks a button or closes the messagebox.

This function may be called at any time, even before SDL_Init(). This makes it useful for reporting errors like a failure to create a renderer or OpenGL context.

On X11, SDL rolls its own dialog box with X11 primitives instead of a formal toolkit like GTK+ or Qt.

Note that if SDL_Init() would fail because there isn't any available video target, this function is likely to fail for the same reasons. If this is a concern, check the return value from this function and fall back to writing to stderr if you can.


This function is available since SDL 3.0.0.

Code Examples

                         "Missing file",
                         "File is missing. Please reinstall the program.",

CategoryAPI, CategoryVideo

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