Online key validation

Hi ,
Here is hat i am looking for ....

Installer should take input for "Product Key" & verify online from a mysql DB .

Looking for examples for same .

Thanks
Pankaj

There are NSIS plugins to let the user a serial key. You can use one of them to obtain the serial. Then you need to verify it, which necessarily requires you own custom code. Maybe you'll have to write your own plugin for that. Maye you can use the "inetc" plugin to communicate with the server...

Here's a reference that you might find useful,