# fsCommBusRegister<no value>
The **fsCommBusRegister** is used to register a communication event.

 

##### Syntax

``` wasm
bool fsCommBusRegister(
    const char* eventName,
    fsCommBusWasmCallback callback
    void* ctx
    );
```

 

##### 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 that you want to register.</td></tr><tr class="even"><td><code>callback</code></td><td>Callback to use if the event is received.</td></tr><tr class="odd"><td><code>ctx</code></td><td><p>Context given when the event is registered. The pointer will be sent back when the event is called</p><p>Default value is <code>nullptr</code>.</p></td></tr></tbody></table>

 

##### Return Values

The function returns False if something is wrong with the arguments and/or the registration did not happen, otherwise it returns True.

 

##### Remarks

It should be noted that when you register an event with this function, you must give an eventName, callback and context. However, if in the *same* module you call this function again with the *same* eventName, the callback and context, **it will not register the event a second time**. If you change any of the three parameters, for example use a different eventName, then the registration will work.