i have an idea

[hanicsgo]

can u make OnPreviewItem on syntax code, thanks u very much

[TiBarification]

What you mean? How you can use OnPreviewItem or what?

Add callbacks

...
// Preview works only for ItemType_Toggleable
Shop_SetCallbacks(_, _, _, _, _, OnPreviewItem);
...
}

public void OnPreviewItem(int client, CategoryId category_id, const char[] category, ItemId item_id, const char[] item)
{
   // do what you want with item.
}