# LibTmux.Value.mkWindowIndex

- **Package:** libtmux-haskell
- **Language:** Haskell
- **Kind:** function
- **Source:** https://github.com/libtmux/libtmux-haskell/blob/581f0ee45016ffb2283366bb1edc1658df26c5ed/src/LibTmux/Value.hs#L65
- **Page:** https://libtmux.org/en/haskell/latest/reference/libtmux-value-v-mkwindowindex/

```haskell
mkWindowIndex :: Integer -> Either ValueError WindowIndex
```

Signature types: [`Integer`](https://hackage.haskell.org/package/base-4.22.0.0/docs/Prelude.html#t:Integer), [`Either`](https://hackage.haskell.org/package/base-4.22.0.0/docs/Data-Either.html#t:Either), [`ValueError`](/en/haskell/latest/reference/libtmux-value-t-valueerror/), [`WindowIndex`](/en/haskell/latest/reference/libtmux-value-t-windowindex/).

Construct a nonnegative window-link index.

## Referenced declarations

- [`LibTmux.Value.ValueError`](/en/haskell/latest/reference/libtmux-value-t-valueerror/) (data type)
- [`LibTmux.Value.WindowIndex`](/en/haskell/latest/reference/libtmux-value-t-windowindex/) (data type)