The problem i'm encountering is that the DialogBox widget is blinking, meaning you have to click yes or no multiple times before it disappears. I cant seem to fix the problem. Any ideas?

From the description of your problem (and a quick look at the code which I can't run), the "blinking" is actually multiple DialogBoxes popping up in succesion until the $ver is set right. You have

                   if ( $ver == 1) {
                            for (;;){
                                if ($ver == 2) {last}
                                if ($ver == 0) { goto NO}
                            }
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in a thread, then in main you are popping the DialogBox depending on the value of $ver from a timer (every second).

Fix your verway timer callback. In your sub verway(called by a timer), have a check so that if the DialogBox is currently displayed, it won't display it again. It's as simple as setting a global $is_dialog_up to 0 or 1.