Link between event handle and added button

Hi All,

I add the attribute 'GT_BUTTON' in the class and a button in DO_PREPARE_OUTPUT. Also do the coding in BSP. Now I could see the added button in the Web UI. Then the next step is to add logic when we click on it. So I create the event handle, but I don't know how to link the created event handle with the added button. Could anyone give me any hints. Thank you so much.

BR

Jay