When attempting to make an Arduino controlled RC car, I have gathered the case numbers for each button of my remote control, however when I plug them into the code to read the IR signal, I get an error message telling me that i have not defined those numbers, even though that was not required in the example code. 
How do I fix this error?
[crystal ball gazing mode]
You forgot to put 0x before the hex values you are testing
[/crystal ball gazing mode]
It would be so much easier if you posted your code.