MAPILogonEx(...) returns NULL while calling from MAPILogOn(...)

Question

I am creating default mail application like thunderbird and outlook but with some of the features only. So now problem is only with the word 2007 and excel 2007 while sending file from fileMenu -> send -> E-mail and application gets crashed after clicking on E-mail, but same thing is working in Powerpoint 2007 and one note 2007.

With office 2007, MapiLogon(...) is getting first call and here is my MAPILogOn(...),

// I have used ofstream for the log purpose.
#include <MAPIX.h>

extern "C" ULONG MAPILogon(ULONG_PTR ulUIParam, LPSTR lpszProfileName, LPSTR lpszPassword, FLAGS flFlags, ULONG ulReserved, LPLHANDLE lplhSession)
{
    ofstream outfile;
    outfile.open("e:\\temp\\MAPILogon.txt");

    HRESULT hrs = NULL;

    MAPIINIT_0  MAPIINIT = { MAPI_INIT_VERSION, MAPI_NO_COINIT };
    hrs = MAPIInitialize(NULL);
    lplhSession = nullptr;
    if (hrs != S_OK)
    {
        outfile << "\n MAPI uniititalized";
    }
    else
    {
        outfile << "\n MAPI initialized";

        LPMAPISESSION FAR spSession = NULL;
        outfile << "\n lplhsession - " << spSession;
        hrs = MAPILogonEx(NULL, "Outlook", NULL, MAPI_EXTENDED | MAPI_NEW_SESSION, &spSession);
        if (hrs == NULL)
        {
            outfile << "\n MAPI problem while log in." << spSession;
        }
        else if (hrs == S_OK)
        {
            outfile << "\n MAPI log in successful.";
            return SUCCESS_SUCCESS;
        }

        outfile << "\n Last Error - " << GetLastError();
    }
    return MAPI_E_FAILURE;
}

Here, I am able to initialize MAPI successfully, but MAPILogOnEx(...) returns null, so are there any other things that are required here?

GetLastError() gives 0. "Outlook" is the default profile.

I have looked all the tutorials of stackoverflow and Microsoft but unable to get solution.

score 0 · Answer 1 · answered Jul 19 '16 at 14:55

0

MAPILogonEx returns HRESULT, not a pointer. The lines if (hrs == NULL) and if (hrs == S_OK) are the same since NULL is converted to 0 by the compiler. S_OK is also 0.

answered Jul 19 '16 at 14:55

Dmitry Streblechenko

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yes you are correct, I tested this thing, and both NULL and S_OK is same. – Ujjaval Moradiya Jul 20 '16 at 04:57
Look at the solution, I wrote here. But the thing is office 2007 apps are calling MAPILonOn(...) and I am not doing anything into there still the code is fine with the solution, so Why office 2007 apps are calling MAPILogOn(...) and whereas other office version apps are directly calling MAPISendMail(...) or MAPISendMailW(...) – Ujjaval Moradiya Jul 20 '16 at 05:11
MAPILonOn is Simple MAPI, why would you need it? – Dmitry Streblechenko Jul 20 '16 at 13:29
I am using simple MAPI to use windows feature "Send To", and I don't think I need extended MAPI here. Do I have to use Extended MAPI? – Ujjaval Moradiya Jul 22 '16 at 06:49
I don't know, depends on what you are trying to do. – Dmitry Streblechenko Jul 22 '16 at 13:23
Can you suggest me what should I write in MAPILogon(...)? – Ujjaval Moradiya Aug 05 '16 at 07:18
Do you mean which parameters to use? – Dmitry Streblechenko Aug 05 '16 at 13:16
No, I am asking what is the use of MAPILogon(...), (MS Word 2007 calls MAPILogon(...) first rather than MAPISendMail or MAPISendMailW ? – Ujjaval Moradiya Aug 09 '16 at 03:11
It is Simple MAPI vs Extended MAPI. – Dmitry Streblechenko Aug 09 '16 at 04:53

score 0 · Answer 2 · answered Jul 20 '16 at 05:05

I changed function definition to this - And with the following solution I don't need the MAPIInitialize and MAPILogOnEx.

#define WINAPI      __stdcall
#define SUCCESS_SUCCESS         0

extern "C" ULONG WINAPI MAPILogon(ULONG_PTR ulUIParam, LPSTR lpszProfileName, LPSTR lpszPassword, FLAGS flFlags, ULONG ulReserved, LPLHANDLE lplhSession)
{
    return Success_Success;
}

I added .def file with the following lines -

; file_name.def
LIBRARY file_name
EXPORTS
    MAPILogoff
    MAPILogon
    MAPISendDocuments
    MAPISendMail
    MAPISendMailW

This are the only functions I needed. So office 2007 is calling decorated names of this functions and without this, office 2007 is unable to find functions so without giving a message, office 2007 apps are crashing. Now it is working. Now I have to test the same code with all the office versions and all os. Let's hope it work.

MAPILogonEx(...) returns NULL while calling from MAPILogOn(...)

2 Answers2