I created a custom module which fetch data using third-party APIs.

In admin Dashboard after module installation. I want to check few things form API( i am getting everything from API , just need to show show message once admin activate the module ) if all ok i want to show the message under the Enable/Disable button.

In /var/www/html/magento16/app/code/local/Namespace/ReviewRating/etc/system.xml

<!-- ... -->     <active translate="label comment">          <label>Activate Slider </label>          <frontend_type>select</frontend_type>          <sort_order>54</sort_order>                     <source_model>adminhtml/system_config_source_enabledisable</source_model>          <show_in_default>1</show_in_default>          <show_in_website>1</show_in_website>          <show_in_store>1</show_in_store>   </active> <!-- ... --> 

If i chage my above config as below

 <active translate="label comment">         <label>Activate Slider </label>         <frontend_type>select</frontend_type>        <sort_order>54</sort_order>        <source_model>adminhtml/system_config_source_enabledisable        </source_model>        <frontend_model>reviewrating/adminhtml_system_config_allgood        </frontend_model>        <show_in_default>1</show_in_default>        <show_in_website>1</show_in_website>        <show_in_store>1</show_in_store>     </active> 

and create a model class as below In /var/www/html/magento16/app/code/local/Namespace/ReviewRating/Block/Adminhtml/System/Config/Allgood.php

  <?php     class Namespace_ReviewRating_Block_Adminhtml_System_Config_Allgood extends Mage_Adminhtml_Block_System_Config_Form_Field     {         // if i am doing correct then how i will trigger api here or get to know that module is enabled ??      } 

Please suggest how to proceed. I didn’t find any link related to this in which I can hit API on enable/disable button and then show messages.

Thank You.