I want the internet to send an error message when no one is connecting and was pressing one of the buttons and then they face with the message which announces "you are not connected to the network " and the button won't work until you get connected
I want this application to be applied on android windows phone and iPhone
We do not have the resources to walk you through how to create the internet connection check or how to create your notification, but the example Paul linked will help you create the button. You will then have to write the part that will check for internet connection and create a notification. I hope this makes a bit more sense.