Hex in a Format

[Azz00]

I do this

Result = Hex(10)

my result would come out
A

but i want the result to come out in this format

0x00000000

so my awnser should be

0x0000000A

How can i do this I dont want my awnser to come over 8 Digits Long so there is always 8 after the X

so say i did this

Result = Hex(something)

Result would be.

0x000000A1

etc so it never goes over 8
You Dig ?
how can i do this ?