Need some explanations

[thinhso]

Walls: (Credits to Yuwata)
Left: 6C5814 Pointer - Offset 4
Right: 6C5814 Pointer - Offset C
Top: 6C5814 Pointer - Offset 8
Bottom: 6C5814 Pointer - Offset 10

Character: (Credits to Yuwata)
X Coordinate: 6C61B0 Pointer - Offset 564
Y Coordinate: 6C61B0 Pointer - Offset 568

Item: (Credits to Yuwata)
X Coordinate: 6C6174 Pointer - Offset 344
Y Coordinate: 6C6174 Pointer - Offset 348

What is Pointer and Offset ? They show me ???????? ( 8 ? ) , why those tutorials above only tell us Offset 344 . Does it mean I will enter : 00000344 ?
http://img62.imageshack.us/img62/2847/15rf3.jpg