Discussing the nuts and bolts of software development

Thursday, July 24, 2008


Outlook Entry IDs Made Easy

When developing for Outlook you will quickly realize that there's more than one way of doing things. For example, take a look at the number of APIs for interacting with Outlook:That doesn't even include the six libraries included in the Outlook 2003 Integration API or the excellent 3rd-party Redemption library. I'm positive there are others. Usually you won't use all these APIs in the same project. However, if you want to do anything significant in Outlook, you'll need to use the OOM and MAPI libraries.

It's important to understand the relationship between MAPI and the OOM:When you work with these APIs, you'll hit on the problem of linking them together. Outlook Entry IDs are a good example. Entry IDs uniquely identify most objects in the OOM and MAPI. Being very flexible, Entry IDs can take many shape or form and can cause headaches when you try to handle them.

At its simplest, an Entry ID is a variable length byte buffer, sometimes represented with a simple byte array. In MAPI, most Entry IDs are represented by the ENTRYID structure:


typedef struct { 
BYTE abFlags[4];
This structure usually comes wrapped in the SBinary structure.


typedef struct _SBinary { 
} SBinary, FAR *LPSBinary;
In the Outlook Object Model things take a turn for the worst:Is your head spinning? Mine was.

I solved the problem by creating a class (yet another format!) to facilitate manipulation of all these formats:
class EntryId
EntryId(EntryId const& entryId);

// All explicit so that it's always clear what we are doing.
explicit EntryId(BSTR const* str, bool hexEncoded = true);
explicit EntryId(SBinary const* binary);
explicit EntryId(SAFEARRAY const* array);
explicit EntryId(unsigned long count, unsigned char const* bytes);

// Again, no implicit conversion
CComBSTR toString(bool hexEncoded = true) const;
CComSafeArray toSafeArray() const;
std::vector toByteArray() const;
// ... add more as you need them

// TODO: Add more custom helper functions.
bool isLongTermId() const;

// TODO: Add comparison operators for convenience and ordered
// container support (such as std::map keys). When comparing
// Entry Ids, remember you need to use the
// IMAPISupport::CompareEntryIDs method.

std::vector<unsigned char> m_buffer;
Now whenever I get an Entry ID in any format, the first thing I do is convert it to an EntryId instance. This adds many convenient functionalities:

Labels: , ,

You should definitely check https://essaydragon.com/blog/good-topic-sentences out before writing topic sentences. It will be useful for you in any case
Deadline is something which needs to be followed by one and all irrespective of the position they are working in. But the writers working in buy assignment do not follow this at all. Read myassignmenthelp review before opting for their services so that you get to know the real feedback of the students. The australian help review say that they provide average service in which the students are not always satisfied. The essayroo display the fact that the service provider gives poor quality papers to the students. The students have found that their papers are full of errors and they do not have proper mechanisms for proofreading of the papers. The big assignments review show that they are really unprofessional people who do not know how to behave with the students. One of the most important qualities of the assignment writing services is that it should engage in free revisions and paper editing (if required). edubirdie review shows that the support team doesn’t give enough revision options to the students. Scan essayshark review before choosing their services in order that you get to grasp the feedback of the scholars. The ukessays say that they supply average service during which the scholars don't seem to be forever happy. the scholars feel that the service supplier has ton a lot of to supply to them and that they don't realize the services satisfactory. I hope that will help the students to identify better writing services and help them in making their assignments.
Thanks for sharing this type of interesting information. I have bookmarked it to read again. Exclusive Paper.com offers various service that makes the lives of students relatively easy. So, if you need excel assignment homework just sent us a short request "do my excel assignment", feel free to request our team. As we are working on your task, we guarantee that you will receive the best service.
That’s really so good to visit this site, the blog has helped me a lot in my thesis, before I was quite worried to clear my concepts, thanks
ParkWhiz For PC
Wow!! This really is a nice and awesome piece of information!!
Thanks for sharing this informative post!! Keep such work regularly in future!!
Conversation Secrets
I really enjoy every part and have bookmarked you to see the new things you post. Well done for this excellent article. Please keep this work of the same quality.
Artificial Intelligence course in Chennai
Post a Comment

<< Home

This page is powered by Blogger. Isn't yours?