Well, although this is technical possible, i strongly advise you to not do it, because I strongly think this would be against the EULA/TOS .
You may have a look at: http://www.dual-boxing.com/wiki/inde...of-game_Macros
for Blizz standpoint on delays...

..and even if not, why do you need such a behaviour? -Wouldn't a Round-Robin or some other acepted method work?