# OH_NativeXComponent_Callback


## Overview

Registers a callback for the surface lifecycle and touch event. 

**Since:**
8

**Related Modules:**

[Native XComponent](_o_h___native_x_component.md)


## Summary


### Member Variables

| Name | Description | 
| -------- | -------- |
| [OnSurfaceCreated](_o_h___native_x_component.md#onsurfacecreated)| Invoked when a surface is created. | 
| [OnSurfaceChanged](_o_h___native_x_component.md#onsurfacechanged)| Invoked when the surface changes.  | 
| [OnSurfaceDestroyed](_o_h___native_x_component.md#onsurfacedestroyed)| Invoked when the surface is destroyed.  | 
| [DispatchTouchEvent](_o_h___native_x_component.md#dispatchtouchevent)| Invoked when a touch event is triggered.  |