###### (This is the legacy documentation for stable SDL2, the current stable version; [SDL3](https://wiki.libsdl.org/SDL3/) is the current development version.)
# SDL_HINT_WINDOWS_USE_D3D9EX

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

## Header File

Defined in [SDL_hints.h](https://github.com/libsdl-org/SDL/blob/SDL2/include/SDL_hints.h)

## Syntax

```c
#define SDL_HINT_WINDOWS_USE_D3D9EX "SDL_WINDOWS_USE_D3D9EX"
```

## Remarks

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: -
https://docs.microsoft.com/en-us/windows/win32/direct3darticles/graphics-apis-in-windows-vista#direct3d-9ex
-
https://docs.microsoft.com/en-us/windows/win32/direct3darticles/direct3d-9ex-improvements

This variable can be set to the following values:

- "0": Use the original Direct3D 9 API (default)
- "1": Use the Direct3D 9Ex API on Vista and later (and fall back if D3D9Ex
  is unavailable)

----
[CategoryAPI](CategoryAPI), [CategoryAPIMacro](CategoryAPIMacro), [CategoryHints](CategoryHints)