# SDL_SetError

Set the SDL error message for the current thread.

## Header File

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

## Syntax

```c
int SDL_SetError(const char *fmt, ...);
```

## Function Parameters

|              |         |                                                                      |
| ------------ | ------- | -------------------------------------------------------------------- |
| const char * | **fmt** | a printf()-style message format string.                              |
| ...          | **...** | additional parameters matching % tokens in the `fmt` string, if any. |

## Return Value

(int) Returns always -1.

## Remarks

Calling this function will replace any previous error message that was set.

This function always returns -1, since SDL frequently uses -1 to signify an
failing result, leading to this idiom:

```c
if (error_code) {
    return SDL_SetError("This operation has failed: %d", error_code);
}
```

## Version

This function is available since SDL 2.0.0.

## See Also

- [SDL_ClearError](SDL_ClearError)
- [SDL_GetError](SDL_GetError)

----
[CategoryAPI](CategoryAPI), [CategoryAPIFunction](CategoryAPIFunction), [CategoryError](CategoryError)

