HEX value from String variable

Projects Programming
1

Hey, Im struggling with a project involving the IRremote library, I have a string variable containing a HEX code that I got like this :

String data = "0x" + String(results.value, HEX);

But id like to be able to send it back with irsend.sendNEC, wich require an unsigned long. I'm stuck with converting that string to the unsigned long is there a way like variable.toInt(); ?

thanks !