> can anybody tell me the meaning of the binary string
> representation of a
> PR_ENTRYID, as obtained by calling GetProps() on a mail item?
Its a binary value that is unique for the item (but only unique within the
store - PR_STORE_ENTRYID will tell you the store ID)
> I get e.g. the following IDs:
>
> 000000003C437E32AFD11C49ABB743DDE9EDFE6BE4652000
> 000000003C437E32AFD11C49ABB743DDE9EDFE6B24602000
> 000000003C437E32AFD11C49ABB743DDE9EDFE6B845F2000
> 000000003C437E32AFD11C49ABB743DDE9EDFE6B44612000
> 000000003C437E32AFD11C49ABB743DDE9EDFE6BA4672000
> 000000003C437E32AFD11C49ABB743DDE9EDFE6B64652000
> ^^^^^^
You are getting them via the client libraries, which has already encoded the
binary data as hex for you. If you were to get the property directly from
"extended mapi", you would get a string holding binary data.
>
> In case there isn't any meaning:
> I noticed that most of the data is equal for all messages of one mail
> folder.
> Only the characters marked above (3 bytes) are unique per
> item. Is it always
> like that?
> The reason I'm asking is, that I'd like to have a numeric
> representation of
> those IDs. So, do you think int('0x'+id[40:46],16) would be ok?
The values above already *are* a hexadecimal value - you can't safely change
any part of it.
>>> int("000000003C437E32AFD11C49ABB743DDE9EDFE6B64652000", 16)
344044589573578334092534486689392272954676813824L
Its a very large number to be sure, that that it the "numeric ID".
Mark
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