Hex pairs and reg_binary in windows registry

Hi all,

I understand hexadecimal, binary and decimal and how to convert them to eachother.

When using regedit in windows xp, you can see two different hex numbers in two different formats. For example you can see a 0x###### as a value for a DWORD and you can see hex pairs like ## ## ## ,which the pairs are seperated by a space, as a value for a reg_bianry .

Now I would like to know what is the difference between two different formats of those hex numbers and why they are seperated by a space in the second one and how you convert them to eachother.

and basically how you interpret the one with pairs of numbers.

Any comments would be apprecaited.