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


Use the D3D9Ex API introduced in Windows Vista, instead of normal D3D9.

Header File

Defined in 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.

This hint must be set before initializing the video subsystem.

For more information on Direct3D 9Ex, see: -

This variable can be set to the following values:

CategoryAPI, CategoryAPIMacro, CategoryHints

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