im trying to write macro that short the import macro

imp AsmDll, MsgBox, MsgBox1 ...

macro imp a,[b]{
common
import a, b,`b
}

but i get error already defined ..
so i tried to use equ to join the params but with no luck

c equ
macro imp a,[b]{
forward
c equ b,`b
common
import a, c
}

any help is welcome thanks