Custom button help

hi, could you please help me about
I have a custom button at the info box as Notes
I want to learn item id when clicked
I have tried this but I got “undefined” everytime with different types that I found tips here:
code exp:
scheduler._click.buttons.notes = function(openlink){
eid=scheduler.getEvent(scheduler.section_id);
alert(eid); }

Hi @Erman_Altindag,

If you mean the custom button in the lightbox, you should use the onLightboxButton handler and check the the button id, stmt like that:

scheduler.attachEvent("onLightboxButton", function(button_id, node, e){
    if(button_id == "notes"){
        alert("Notes!");
    }
});

https://docs.dhtmlx.com/scheduler/changing_lightbox_buttons.html

If you want to know the id of the clicked event, please use onBeforeLightbox handler, save the id to the variable with global scope and then use it in the onLightboxButton.