###### (This is the documentation for SDL3, which is the current stable version. [SDL2](https://wiki.libsdl.org/SDL2/) was the previous version!)
# SDL_WINDOWPOS_ISUNDEFINED

A macro to test if the window position is marked as "undefined."

## Header File

Defined in [<SDL3/SDL_video.h>](https://github.com/libsdl-org/SDL/blob/main/include/SDL3/SDL_video.h)

## Syntax

```c
#define SDL_WINDOWPOS_ISUNDEFINED(X)    (((X)&0xFFFF0000) == SDL_WINDOWPOS_UNDEFINED_MASK)
```

## Macro Parameters

|       |                            |
| ----- | -------------------------- |
| **X** | the window position value. |

## Version

This macro is available since SDL 3.1.3.

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[CategoryAPI](CategoryAPI), [CategoryAPIMacro](CategoryAPIMacro), [CategoryVideo](CategoryVideo)