# key\_event.h<a name="EN-US_TOPIC_0000001054918127"></a>

-   [Overview](#section1998143923165628)
-   [Summary](#section1143337583165628)
-   [Data Structures](#nested-classes)

## **Overview**<a name="section1998143923165628"></a>

**Related Modules:**

[Graphic](graphic.md)

**Description:**

Declares a key event, which indicates that a physical button is pressed or released. 

**Since:**

1.0

**Version:**

1.0

## **Summary**<a name="section1143337583165628"></a>

## Data Structures<a name="nested-classes"></a>

<a name="table841130392165628"></a>
<table><thead align="left"><tr id="row466957497165628"><th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.1"><p id="p184087319165628"><a name="p184087319165628"></a><a name="p184087319165628"></a>Data Structure Name</p>
</th>
<th class="cellrowborder" valign="top" width="50%" id="mcps1.1.3.1.2"><p id="p459221437165628"><a name="p459221437165628"></a><a name="p459221437165628"></a>Description</p>
</th>
</tr>
</thead>
<tbody><tr id="row1881272376165628"><td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.1 "><p id="p1416171713165628"><a name="p1416171713165628"></a><a name="p1416171713165628"></a><a href="ohos-keyevent.md">OHOS::KeyEvent</a></p>
</td>
<td class="cellrowborder" valign="top" width="50%" headers="mcps1.1.3.1.2 "><p id="p1785338830165628"><a name="p1785338830165628"></a><a name="p1785338830165628"></a>Defines a key event, which indicates that a physical button is pressed or released. </p>
</td>
</tr>
</tbody>
</table>