Mmm.. alright:
First off, the dialog needs slight alignment. Mostly directed at the dialog texts, some don\'t fit on completely and some are interfering with other dialog objects. This could be on my behalf, as I do not use the windows default scheme. Next, the coding. Very poorly coded imo, please remove those excess /\'s and brackets. :) Also, you lack some error checking. You don\'t check if you are an op, or, in the dialog, if some of the requirements for certain commands are met. You could receive a bit of errors right there. Just curious, what\'s with the /msg $chan? Why spam the channel? I\'d use /echo -a. Overall, nice thought and effort was put into this. I\'d just take the time to develop it a bit more. As this needs a bit of work imo.
Good luck. :)