alarm message

hello
I want a way to make alarm message for some event such as expire date in records , and this alarm appear in list page when date been expire.
I hope to get some help please
thanks

You can use the Page_* server events to set warning message to the page. For example:WarningMessage = “my warning message”;Read:
https://aspnetmaker.dev/docs/#/customscripts.html?id=server-events

So is there any way to put these messages in inbox to read them later for v21?

Explain what you mean by “inbox”.

I meant every warning messages will be in notification box to show each of these messages when open this book.

Check out Tools → Advanced Settings → Use Bootstrap Toast message.