This article shows how you can add new column to customer grid in Magento 1.x admin. In this example, we will be adding a fetching the fax field value from customer’s billing address and showing in the customer grid in Magento admin.
For this, you need to rewrite/override the Adminhtml’s customer_grid block class.

This article shows how you can add new columns to sales order grid in Magento 1.x admin.
For this, you need to rewrite/override the Adminhtml’s sales_order_gird block class.
Here is the block override code to be written in your module’s config.xml file:

This article show how you can create sales order programmatically through code in Magento 1.x.
This code example also includes creating new customer if the customer email is not already registered. It also shows how you can save customer address to the newly created customer. This code has been tested for simple products.
Here are the steps followed in the code below:

Google Tag Manager is a FREE Magento 2 Extension that allows you to integrate Google Tag Manager to your site. This extension also provides ecommerce transaction tracking feature. You just need to enter your Tag Manager container id in the extension’s configuration settings.
This module is compatible with Magento version 2.0 and later.

This article shows how you can programmatically (through code) create customers in Magento 1.x.
In this example code, you can find saving customer general information along with saving customer’s billing address and shipping address.
Here are the steps followed in the code below: