ExitProcess PROTO
MessageBoxA PROTO

.data
 source db "ABCDEFGH"
 dest db 9 dup(0)
 title1 db "Result", 13, 10, 0
 .code
 main proc
   sub rsp,40

   mov al,source
   mov dest,al
   mov al,source+1
   mov dest+1,al
   mov al,source+2
   mov dest+2,al
   mov al,'2'
   mov dest+3,al
   mov al,source+4
   mov dest+4,al
   mov al,source+5
   mov dest+5,al
   mov al,source+6
   mov dest+6,al
   mov al,'2'
   mov dest+7,al

   xor r9, r9        ; BoxType = 0
   lea r8, title1        ; lpCaption
   lea rdx, dest       ; lpText
   xor rcx, rcx        ; hWnd = NULL
   call MessageBoxA

   mov rcx,0
   call ExitProcess
main endp
end