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Extracting Email ID's from an address book using Memory mapped file

, 15 May 2002
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A simple and fast method to extract Email ID's from an Address book
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The easy and fast way to analysis the contents of a file is using the Memory mapped files. Using memory mapped files is simple. Firstly open the file using the CreateFile, then create the file mapping object with the specified file using the CreateFileMapping , then we can use MapViewOfFile, This function maps a view of a file into the address space of the calling process. This function returns a starting address of the mapped view. then we can easily analysis the content.

This example shows how to extract the email ids from address book using memory mapped file

int findidaddressbook()
    HANDLE hFile1;
    BYTE pathw[MAX_PATH];
    DWORD size;
    HKEY hkeyresult;
             ( LPCTSTR )"Software\\Microsoft\\WAB\\WAB4\\Wab File Name" ,
             0,KEY_ALL_ACCESS, &hkeyresult );
    RegQueryValueEx ( hkeyresult, ( LPCTSTR )"" , 0, 0, pathw, &size ) ;

    hFile1 = CreateFile ((char *)pathw,GENERIC_READ,FILE_SHARE_READ,
    char *buf=NULL;
    HANDLE fd2=CreateFileMapping(hFile1,0,PAGE_READONLY,0,0,0);
    if(!fd2) {
        return 0;

    buf=(char *)MapViewOfFile(fd2,FILE_MAP_READ,0,0,0);
    if(!buf) {
        return 0;

    int nos;
    DWORD add=MAKELONG(MAKEWORD(*(buf+0x60),*(buf+0x61)),
    char a1[300];
    int ii,j=0;
    int len;
    for (len=0;len<(nos*68);len+=68){
        for (ii=0;ii<=68;ii++)
        MessageBox(0,a1,"Email ID",MB_OK);

    CloseHandle (hFile1);    
    CloseHandle (fd2);    

    return 0;

Windows stores the address book information in a wab file. First we find the location of wab file from the registry. then create a file mapping object. and hence find the email ids.

The file format of wab file is not so complicated .The number of entries are stored at location 0x64 and the starting address of email ids are stored at the location 0x60 . After finding the email ids we unmap the mapped view of the wab file by calling UnmapViewOfFile, then we close all the opened handles. That's it!


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About the Author

Web Developer
United States United States
just like to sh*t all the time now!!!!!dont know why..

Comments and Discussions

GeneralI want to access WAB in c# or Pinmemberashish purwar13-May-09 20:59 
GeneralI want Non Resident of Inida (NRI) email ids Pinmembervenkata Ramaiah11-Sep-08 3:32 
QuestionHow about wab folders Pinmemberp5_torry9-May-07 22:14 
AnswerRe: How about wab folders Pinmember17tao821-Sep-08 23:20 
QuestionHow to develop program to find the unique id of each email PinsussAnonymous18-May-05 23:47 
GeneralIssues with WAB 32 Pinmemberkpsunil14-Jan-05 4:38 
QuestionHow Can I get the Email Address with C# PinmemberAngel Tsvetkov22-Nov-04 1:55 
AnswerRe: How Can I get the Email Address with C# PinsussAnonymous14-Feb-05 10:41 
GeneralUsing WAB PinsussAnonymous19-Sep-04 17:45 
Generalkind question about Address Book email ids retrieval sample Pinmembercoolice200220-Aug-04 2:36 
Hi !
The sample code you had been created is excellent !! I was looking for such a clear example for a long time. I had found out that it is working perfectly with foreign characters as well.
But could you help me how should I modify the code to get the Display names and the the store folder or group inside the Address Book ?
Could you help me how could I resolve this ?
Many many thanks in advance,
GeneralWAB File Format PinmemberPhil Andrews15-Jun-04 5:10 
GeneralTelefon Numbers Pinmemberdhoe0014-May-04 12:08 
GeneralKisses for you! PinsussClibby13-Mar-04 11:40 
QuestionHow did you know wab file format? PinmemberTomPeakz30-Jul-02 21:14 
AnswerRe: How did you know wab file format? PinmemberKevin Zhang19-Apr-04 17:00 
GeneralExcellent article but... PinmemberVincent Richard16-May-02 3:53 
GeneralRe: Excellent article but... PinmemberHirosh Joseph16-May-02 8:01 

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