Converting object to double

Hi everyone,
I have an object called x and a function which takes a double. Is it possible to pass a pointer to x to the function which takes a double.
The function which recieves it only needs to store, and it will be passed to another function where the pointer can be cast back to object x and dereferenced like normal.

Ie in C It would look like this (not sure it would work but it explains what im trying to do):

char p;
char *d;
int t = (int) &p;
d = (int*) t;
*d = 1;

How would I do this?

errm in english...
theres no double in the C pseudo code
can you explain step by step what you mean?
what type of object is x?

What end result are you after there could be a more straight forward way to solve it.

Sorry I was mullerd earlier(up all night), almost falling asleep!!

I want to be able to store a pointer to any object in any other arbitary data type such as a string.

I want to be able to store pointers to blitz objects in LUA and then pass them back to BlitzMax and dereference them.

a little bit of playing resulted in this:

Type TType
	Field val:Int
End Type


Global myType:TType = New TType
myType.Val = 10

Local pType:TType Ptr = Varptr myType
Local StringPointer:String
StringPointer = String(Int(pType))
Print StringPointer
Print pType[0].val

'Local ppType:Byte Ptr = Varptr pType
'ppType = Byte Ptr(StringPointeR)
Local pType2:TType Ptr = TType Ptr(Int(StringPointer))
Print pType2[0].Val

messy I know, but is it of any use?

Thats great dude, Cheers!