Verification of User Via Mac Id and check on website database

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C#

PHP

Hi Guys,

I'm a newbie in c# programming but completed a simple project.

So I need if a user open my program then he/she need to verify there user id given by me.
As they enter there user ID application should return 2 values to defined website "user id and mac id" and website should check given user id and mac id in database.

So i'm getting mac id of system, and thinking that user id and mac id check will be same as username and password.
So issue is how to map my application and website also how to create a script that check user id and mac id of application.

Need a serious help guys.

Thanks