# SimConnect_SubscribeToFlowEvent<no value>
The **SimConnect\_SubscribeToFlowEvent** function is used to receive a [SIMCONNECT\_RECV\_FLOW\_EVENT](../structures-and-enumerations/simconnect-recv-flow-event/) message when the simulation triggers some flow events, for example during a [Back On Track](../../../../content-configuration/flt-files/back-on-track/) event.

-   This API is available through [Wasm](../../../wasm/flow-api/flow-api/), [Javascript](../../../javascript/flow-api/) and through [SimConnect](simconnect-subscribetoflowevent/).

 

You can find a sample project to use as a reference when using the Flow API here:

-   [FlowAircraft](../../../../samples-tutorials/samples/simobjects-aircraft/modularaircraft/flowaircraft/)

 

##### Syntax

``` cpp
HRESULT SimConnect_SubscribeToFlowEvent(
    HANDLE  hSimConnect
    );
```

 

##### Parameters

{{< table-wrapper >}}

| Parameter     | Description                    | Type    |
|---------------|--------------------------------|---------|
| *hSimConnect* | Handle to a SimConnect object. | Integer |

{{< /table-wrapper >}}


  

##### Return Values

The function returns an **HRESULT**. Possible values include, but are not limited to, those in the following table.

{{< table-wrapper >}}

| Return value | Description             |
|--------------|-------------------------|
| S\_OK        | The function succeeded. |
| E\_FAIL      | The function failed.    |

{{< /table-wrapper >}}