Create config.xml file

Firstly create the config.xml file in app/code/local/Mywork/ImageSlider/etc/
[php]
<?xml version="1.0"?>
<config>
<modules>
<Mywork_ImageSlider>
<version>1.0.0</version>
</Mywork_ImageSlider>
</modules>
<admin>
<routers>
<imageslider>
<use>admin</use>
<args>
<module>Mywork_ImageSlider</module>
<frontName>imageslider</frontName>
</args>
</imageslider>
</routers>
</admin>

<adminhtml>
<menu>
<imagesliderdata>
<title>Image Slider</title>
<sort_order>200</sort_order>
<children>
<imgsld module="imageslider">
<title>Manage Image Slider</title>
<sort_order>200</sort_order>
<action>imageslider/adminhtml_imageslider</action>
</imgsld>
</children>
</imagesliderdata>
</menu>

<layout>
<updates>
<imageslider>
<file>imageslider.xml</file>
</imageslider>
</updates>
</layout>

</adminhtml>

<global>
<helpers>
<imageslider>
<class>Mywork_ImageSlider_Helper</class>
</imageslider>
</helpers>
<blocks>
<imageslider>
<class>Mywork_ImageSlider_Block</class>
</imageslider>
</blocks>
<models>
<imageslider>
<class>Mywork_ImageSlider_Model</class>
<resourceModel>imageslider_mysql4</resourceModel>
</imageslider>
<imageslider_mysql4>
<class>Mywork_ImageSlider_Model_Mysql4</class>
<entities>
<imgslider>
<table>image_slider</table>
</imgslider>
</entities>
</imageslider_mysql4>
</models>

<resources>
<imageslider_setup>
<setup>
<module>Mywork_ImageSlider</module>
</setup>
<connection>
<use>core_setup</use>
</connection>
</imageslider_setup>

<imageslider_write>
<connection>
<use>core_write</use>
</connection>
</imageslider_write>
<imageslider_read>
<connection>
<use>core_read</use>
</connection>
</imageslider_read>

</resources>

</global>

</config>
[/php]
Note:- 1) Firstly create the module version in the version element.
2) create the routers which is in admin element and router is imageslider.
3) create the menu in the adminhtml element where action is imageslider/adminhtml_imageslider.
4) create the imageslider.xml file which is in the app/design/adminhtml/default/default/layout/.
5) to create blocks, models and helpers in the global element.
6) to create the table must be in the resources element.