Windows Application for Facebook Page messages for bulk reply with Attachment

I need a Windows Application for Facebook Page messages which can reply thousands customers who ask questions to my page using a single click reply (with attachment file) to all my page messages reply without doing hours of reply manually. Also need to add attachment option so that I can send images also. Also make this software need registration key so that I can make the software usable for 1 pc using 1 key for registration. So that I can sell this software to the others. Also I need the source code for future development. Please check the video that I attached so that you can understand I need the software same but with attachment file also.