URL to my module with adminhtml controller

Question

I added a form to customer page from backend. How do I create the URL for action attribute to a certain function ( public function editAction(){...} )? Function that is founded in app/code/local/company/module/controllers/Adminhtml/IndexController.php

Ideeas?

The form is used to set a custom customer attribute created in that module. The form only contains the input and a button for submit. In that particular action I setCustomAttribute and send an email. But every time I submit I get that 404.

This is the layout for my template:

<layout version="0.1.0">
    <adminhtml_customer_edit>
        <reference name="customer_edit_tab_view">
            <action method="setTemplate">
                <template>customcustomerfields/customer/tab/view.phtml</template>
            </action>
        </reference>
    </adminhtml_customer_edit>
</layout>