Which macro? the one of PBP or your own?

If PBP one well, no real problem
ByteA VAR BYTE
ByteB VAR BYTE

@ MOVE?CB 123, _ByteA
@ MOVE?BB _ByteA, _ByteB
ByteB is now equal to 123

don't forget, it is CASE SENSITIVE. Try it, and if you still have problem, post your code here, we will have a look to it.

Also, you can refer to various DT include files, or my KeyPad or my Nokia GLCD. Lot's of macro use in those