Generic function
Returns the Next button in the specified multi-page dialog.
dialog-next-button dialog => next-button
<dialog-frame>.
false-or(<button>).
duim-frames
duim-frames
Returns the Next button in dialog. This is most useful in multi-page dialogs such as property frames and wizard frames, which typically have Back and Next buttons that let the user navigate forward and backward through the sequence of pages that comprise the dialog.