# CFX::REGISTER_NUI_CALLBACK

- **Hash:** `0xC59B980C`
- **Namespace:** CFX
- **Runtime name (Lua/JS):** `RegisterNuiCallback`
- **Side:** client (Cfx runtime native)
- **Name status:** official
- **Documentation:** named only
- **URL:** https://natives.borderlinerp.com/natives/CFX/REGISTER_NUI_CALLBACK

## Signature

```c
void REGISTER_NUI_CALLBACK(char* callbackType, func callback);
```

## Parameters

- `callbackType` (`char*`)
- `callback` (`func`)

## Returns

`void`

## Usage

### Lua

```lua
RegisterNuiCallback(callbackType, callback)

-- always available, by hash
Citizen.InvokeNative(0xc59b980c, callbackType, callback)
```

### JavaScript

```js
RegisterNuiCallback(callbackType, callback);

// by hash
Citizen.invokeNative('0xc59b980c', callbackType, callback);
```

### C#

```csharp
Function.Call((Hash)0xc59b980c, callbackType, callback);
```

*Sources: Cfx.re native reference.*