How to create Free text in Module Pool

Hello Everyone,

I am facing an issue creating free text field in Module Pool. I tried searching and going through many blogs but found nothing informative or proper coding required to create this.

Below is the image of what is needed to develop.

Can someone please help me with the steps and the coding required to create this in Module Pool Programming?

Also how to save the data and read the data from this text box?

Thanks & Regards,

Alex Dsouza