java - display a dialogue box on click of a custom menu item in eclipse -

i'm trying create custom plugin, adds item (i refer : mymenu) main menu bar in eclipse. on click should dialogue box allows user select actions. i'm having problem how create dialogue box on clicking mymenu. have tried using windowbuilder in eclipse, doesn't fulfill requirement

any highly appreciated. in advance.

please see vogella's tutorials: - http://www.vogella.com/tutorials/eclipsecommands/article.html - http://www.vogella.com/tutorials/eclipsedialogs/article.html#dialogs_jface

regards,