EntryId of PSTMessage

In PST file every object gets an entry id so you can easily get Message from the file, how can I find it in PSTMessage ? (even if not directly trough the API) thanks
(reference - [here](https://docs.microsoft.com/en-us/office/vba/outlook/how-to/items-folders-and-stores/working-with-entryids-and-storeids#:~:text=Each%20Outlook%20item%20has%20a,is%20assigned%20a%20new%20EntryID.) )