Kdialog

Hi i recently got Kdialog to send messages to users. I have a few questions. Firstly, when i put a message, if i have spaces in between the word only the first word shows up on the pop up. How do i have multiple words without using - or _? Secondly, If i have a pop up with yes an no buttons, how do i find out what the users pressed? Finally, does Kdialog work if people are connected via ssh and vnc? Is there any way to send a pop up message to another Linux computer on the network?

Thanks In Advance