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# XStoreGetUserPurchaseIdResultSize

> XStoreGetUserPurchaseIdResultSize

Gets the size of the result returned by [XStoreGetUserPurchaseIdResult](https://docs.xbox.com/reference/system/xstore/functions/xstoregetuserpurchaseidresult.md).

## Syntax

```cpp theme={null}
HRESULT XStoreGetUserPurchaseIdResultSize(  
         XAsyncBlock* async,  
         size_t* size  
)  
```

### Parameters

*async*   \_In\_\
Type: [XAsyncBlock\*](https://docs.xbox.com/reference/system/xasync/structs/xasyncblock.md)

The XAsyncBlock passed to [XStoreGetUserPurchaseIdAsync](https://docs.xbox.com/reference/system/xstore/functions/xstoregetuserpurchaseidasync.md). The [XAsyncBlock](https://docs.xbox.com/reference/system/xasync/structs/xasyncblock.md) can be used to poll for the call's status and retrieve call results. See [XAsyncBlock](https://docs.xbox.com/reference/system/xasync/structs/xasyncblock.md) for more information.

*size*   \_Out\_\
Type: size\_t\*

On success returns the size of the result that will be returned by [XStoreGetUserPurchaseIdResult](https://docs.xbox.com/reference/system/xstore/functions/xstoregetuserpurchaseidresult.md).

### Return value

Type: HRESULT

HRESULT success or error code.

## Remarks

This result function allows you to retrieve the size of the purchase ID when [XStoreGetUserPurchaseIdResult](https://docs.xbox.com/reference/system/xstore/functions/xstoregetuserpurchaseidresult.md) was called. As such, this function should be called after [XStoreGetUserPurchaseIdResult](https://docs.xbox.com/reference/system/xstore/functions/xstoregetuserpurchaseidresult.md) has been called, usually in the context of a callback function. See [XStoreGetUserPurchaseIdAsync](https://docs.xbox.com/reference/system/xstore/functions/xstoregetuserpurchaseidasync.md) for a usage example.

## Requirements

**Header:** XStore.h (included in XGameRuntime.h)

**Library:** xgameruntime.lib

**Supported platforms:** Windows, XBOX One family consoles and XBOX Series consoles

## See also

[XStore](https://docs.xbox.com/reference/system/xstore/xstore_members.md)\
[XStoreGetUserPurchaseIdAsync](https://docs.xbox.com/reference/system/xstore/functions/xstoregetuserpurchaseidasync.md)\
[XStoreGetUserPurchaseIdResult](https://docs.xbox.com/reference/system/xstore/functions/xstoregetuserpurchaseidresult.md)


## Related topics

- [XStore (API contents)](https://docs.xbox.com/reference/system/xstore/xstore_members.md)
- [Using C# wrappers for GDK APIs in your Unity project](https://docs.xbox.com/build/gdk-and-engines/unity/unity-api-wrappers.md)
- [XStoreGetUserPurchaseIdResult](https://docs.xbox.com/reference/system/xstore/functions/xstoregetuserpurchaseidresult.md)
- [XStoreGetUserPurchaseIdAsync](https://docs.xbox.com/reference/system/xstore/functions/xstoregetuserpurchaseidasync.md)
- [XStoreGetUserCollectionsIdResultSize](https://docs.xbox.com/reference/system/xstore/functions/xstoregetusercollectionsidresultsize.md)