Icons in main menu

Hi,
I built webradio on ARM platform. Device works perfect.
Now I am trying some change in code. I would like add some new items to
main menu or replace original. But I don't understand how works menu icons.
Menu icons are defined in menu.h like two-dimensional array. In menu.c are
are initialized in hexa.
Could someone please explain me this hexa representation. How can I get
this from my own icon image. What does it mean for example:
img_station[3][4*32]?
Regards
Juraj

One icon consists of 3 monochrome images with 32 x 32 pixel. There are 3
images because of the animation.
4 bytes (32 bit) are one line of the image:

const unsigned char img_station[3][4*32] =
{
  { 0x30,0x00,0x00,0x00, //1st line of 32 bit
    0x30,0x00,0x00,0x00, //2nd line of 32 bit
    ...

Rgds
Andreas

Thanks Andreas for your explanation.
I have tried and I got it.