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


A variable controlling whether SDL uses the D3D9Ex API introduced in Windows Vista, instead of normal D3D9.

Header File

Defined in <SDL3/SDL_hints.h>




Direct3D 9Ex contains changes to state management that can eliminate device loss errors during scenarios like Alt+Tab or UAC prompts. D3D9Ex may require some changes to your application to cope with the new behavior, so this is disabled by default.

For more information on Direct3D 9Ex, see:

The variable can be set to the following values:

This hint should be set before SDL is initialized.


This hint is available since SDL 3.0.0.

CategoryAPI, CategoryAPIMacro, CategoryHints

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