Add form in order view on adminhtml

Question

How i add a form in order view like this image

on click simply record the form in a database table, the information will always be seen in the own form.

Answer 1

Will need to override few .php/.phtml files.

In design/adminhtml/layout/your_layout.xml

<adminhtml_sales_order_view>
     <reference name="order_tab_info">
            <action method="setTemplate">
                    <template>your_path_to_admin_template/info.phtml</template>
            </action>
            <block type="your_module/adminhtml_sales_order_view_yourform" name="your_name" as="your_name" template="your_path_to_admin_template/your_form.phtml"></block>
       </reference>

Now, you can call $this->getChildHtml('your_name') in your_path_to_admin_template/info.phtml file, anywhere you would like to.

To call your controller action please check Mage_Adminhtml_Block_Sales_Order_View_History.php file. It will give you head start.

Hope this helps.