# fsCommBusCall<no value>
The **fsCommBusCall** function is used to call an event registered in a WASM or JS module.

 

##### Syntax

``` wasm
bool fsCommBusCall(
    const char* eventName,
    const char* buf,
    unsigned int bufSize,
    FsCommBusBroadcastFlags broadcastTo = FsCommBusBroadcast_Default
    );
```

 

##### Members

<table><thead><tr class="header"><th>Parameters</th><th>Description</th></tr></thead><tbody><tr class="odd"><td><code>eventName</code></td><td>The name of the event to call.</td></tr><tr class="even"><td><code>buf</code></td><td>A buffer that will be sent with the callback.</td></tr><tr class="odd"><td><code>bufSize</code></td><td>Size of the buffer that is being sent with the callback.</td></tr><tr class="even"><td><code>broadcastTo</code></td><td><p>The flags that determined which module (JS/WASM) the event is to be broadcast to. You can find more details here: <code>FsCommBusBroadcastFlags</code></p><p>The default value is <code>FsCommBusBroadcast_Default</code>.</p></td></tr></tbody></table>

 

##### Return Values

The function returns False if something has gone wrong, otherwise it returns True.

 

##### Remarks

This function will post a message on a bus which will call registered functions. This part will be delayed and is not synchronous with the {{< glossterm >}}wasm{{< /glossterm >}} module. This is why you cannot have a return value to know if a message has been delivered to someone, only a return to know if there has been some internal error (eg: `buf = nullptr` and `size != 0` for instance).