yes, you can, but you have to add the buttons in (v)JASS and the hotkeys are "represented" by a number code which i forgot
but im sure you can find a more detailed approach on this subject on this forum or wc3c/hive
As an alternative you could create a dummy unit, force the selection via triggers and give it abilities with hotkeys.
As a player i hate dialogues because they are activated by hitting the Enter button.
If i am chatting right now and a dialogue suddenly pops up i will choose a random option when hitting enter without notice.
That was the source for much rage in the past for me.
I'm on a page about incorrect corrections, and spent the better part of like two hours trying to get someone to understand that -5^2 = -25, not 25, and then that post had comments get reposted because that group is self sustaining, and that person was in turn trying to explain what I just explained to them. And I'm taking that as a victory
I will be AFK for a couple of days you guys hold down the fort while I am gone. I will be checking in on my phone but that will severly limit me. Be back saturday!