Data type error

Hello .........
I have a simple problem i.e I wana use a varriable globaly with register keyword ......
I mean to say

Code:

---

class Myclass
{
...........
register int value;
..............
}

---

but whenevr I compile it , It gives error
error: storage class specified for ‘value’
:confused:
I don't know what is wrong ????
anyone has any idea??????????????????????????????????:(

you can't say "register" for variables in a struct