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(This is the legacy documentation for stable SDL2, the current stable version; SDL3 is the current development version.)


Gets a reference to the default user handle for GDK.

Header File

Defined in SDL_system.h


int SDL_GDKGetDefaultUser(XUserHandle * outUserHandle);

Function Parameters

XUserHandle * outUserHandle a pointer to be filled in with the default user handle.

Return Value

(int) Returns 0 if success, -1 if any error occurs.


This is effectively a synchronous version of XUserAddAsync, which always prefers the default user and allows a sign-in UI.


This function is available since SDL 2.28.0.

CategoryAPI, CategoryAPIFunction, CategorySystem

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