Arduino UNO ==> how to check what is on the ATmega328p MC?

hi i have uploaded a program to my MC ATmega328p-pu using Arduino Uno. how do i check and see the data on the chip? can i use the Arduino Development Environment software to do this..if yes how?
thanks in advance!
cheers
SN

luv life live life

You can use AVRDUDE to download the parts of the FLASH memory that are not protected. That will give you a .HEX file you can look at.