###### (This is the documentation for SDL3, which is under heavy development and the API is changing! [SDL2](https://wiki.libsdl.org/SDL2/) is the current stable version!)
# SDL_GetJoystickInstanceGUID

Get the implementation-dependent GUID of a joystick.

## Header File

Defined in [SDL_joystick.h](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_joystick.h), but apps should use `#include <SDL3/SDL.h>`

## Syntax

```c
SDL_JoystickGUID SDL_GetJoystickInstanceGUID(SDL_JoystickID instance_id);

```

## Function Parameters

|                     |                          |
| ------------------- | ------------------------ |
| **instance_id**     | the joystick instance ID |

## Return Value

Returns the GUID of the selected joystick. If called with an invalid
instance_id, this function returns a zero GUID.

## Remarks

This can be called before any joysticks are opened.

## Version

This function is available since SDL 3.0.0.

## See Also

* [SDL_GetJoystickGUID](SDL_GetJoystickGUID)
* [SDL_GetJoystickGUIDString](SDL_GetJoystickGUIDString)

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[CategoryAPI](CategoryAPI), [CategoryAPIFunction](CategoryAPIFunction)