Posted on 2000-03-02
Medium Priority
Last Modified: 2013-11-20
Can somebody tell me what is wrong with this piece of code??
pShNM doesn't points to an SHNAMEMAPPING struct

TCHAR from[256];
TCHAR to[256];

_tcscpy(from, _T("c:\\adobeapp\\test.txt"));
_tcscpy(to, _T("c:\\test.txt"));
from[_tcslen(from) +1]=0;

memset(&shfo, 0x00, sizeof(shfo));
shfo.hwnd = AfxGetMainWnd()->m_hWnd;
shfo.wFunc = FO_COPY;
shfo.pFrom = from;
shfo.pTo = to;

if (0 == ::SHFileOperation(&shfo))
    if (shfo.hNameMappings)
      SHNAMEMAPPING nameMapping;

        // try to obtain a pointer
        // to the first (and in this
        // case the only)
      // SHNAMEMAPPING struct of the
        // structure pointed to by
        // shfo.hNameMappings

        // THIS IS THE PROBLEM: pShNM doesn't point to an
        // SHNAMEMAPPING struct when the file being operated on
        // was renamed by the file system
      SHNAMEMAPPING* pShNM =   (SHNAMEMAPPING*)((char*)shfo.hNameMappings + sizeof(int));


The docs say the following: "Treat hNameMappings as a pointer to a structure whose first member is an INT value, followed by an array of SHNAMEMAPPING structures. The INT value will be set to the number of structures in the array. Each SHNAMEMAPPING structure will contain the old and new path name for one of the renamed files."

The first member of the struct pointed to by SHFILEOPSTRUCT.hNameMappings (the number of SHNAMEMAPPING structs that will follow this int value) seems correct but the bytes that follow this integer value are just junk ... and not an SHNAMEMAPPING struct
Environment: NT4 SP5 IE5.0
(maybe it's something trivial but I don't know what I'm doing wrong)
Question by:searching
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 7

Author Comment

ID: 2577814
Adjusted points to 150

Expert Comment

ID: 2577843
I think under NT SHNAMEMAPPING includes UNICODE strings. So you would have to convert them.

SHNAMEMAPPING* pShNM =   (SHNAMEMAPPING*)((char*)shfo.hNameMappings + sizeof(int));

TCHAR szOldPath[MAX_PATH] = {0};
WideCharToMultiByte(CP_ACP, 0, reinterpret_cast<LPWSTR>(pShNM->pszOldPath), MAX_PATH, szOldPath, MAX_PATH, NULL, NULL );

Under Win95 you should not have this problem


Author Comment

ID: 2579251
Edited text of question.
Get MongoDB database support online, now!

At Percona’s web store you can order your MongoDB database support needs in minutes. No hassles, no fuss, just pick and click. Pay online with a credit card. Handle your MongoDB database support now!


Author Comment

ID: 2579275
Edited text of question.

Author Comment

ID: 2579279
Adjusted points to 200

Author Comment

ID: 2579280
I checked the memory pointed to by pShNM and it doesn't points to a wide character version of an SHNAMEMAPPING struct ...
Anyway tnx for the tip gelbert, all further suggestions are welcome ...

Author Comment

ID: 2579678
Adjusted points to 225
LVL 31

Accepted Solution

Zoppo earned 900 total points
ID: 2580297
I think I've found it:

It seems MSDN's description is buggy. The hNameMappings does NOT point to an int followed by an array of SHNAMEMAPPING structures. It points to an int follows by an array of pointers to SHNAMEMAPPING structures.

I.e. following code works on my system:

SHNAMEMAPPING* pShNM =   (SHNAMEMAPPING*)*( (int*)shfo.hNameMappings + 1 );
TCHAR szOldPath[MAX_PATH] = {0};
TCHAR szNewPath[MAX_PATH] = {0};
WideCharToMultiByte(CP_ACP, 0, reinterpret_cast<LPWSTR>(pShNM->pszOldPath), MAX_PATH, szOldPath, MAX_PATH, NULL, NULL );
WideCharToMultiByte(CP_ACP, 0, reinterpret_cast<LPWSTR>(pShNM->pszNewPath), MAX_PATH, szNewPath, MAX_PATH, NULL, NULL );
printf( "Renamed %s to %s\n", szOldPath, szNewPath );

hope that helps,


Author Comment

ID: 2580712
Many tnx Zoppo, you deserve the points!

BTW: In my opinion it's awfull that MS don't describe this bug in their Knowledge Base, after all this function exists since the introduction of Win32 if I'm not wrong ...

Featured Post

Independent Software Vendors: We Want Your Opinion

We value your feedback.

Take our survey and automatically be enter to win anyone of the following:
Yeti Cooler, Amazon eGift Card, and Movie eGift Card!

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Introduction: Load and Save to file, Document-View interaction inside the SDI. Continuing from the second article about sudoku.   Open the project in visual studio. From the class view select CSudokuDoc and double click to open the header …
Introduction: Finishing the grid – keyboard support for arrow keys to manoeuvre, entering the numbers.  The PreTranslateMessage function is to be used to intercept and respond to keyboard events. Continuing from the fourth article about sudoku. …
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
Add bar graphs to Access queries using Unicode block characters. Graphs appear on every record in the color you want. Give life to numbers. Hopes this gives you ideas on visualizing your data in new ways ~ Create a calculated field in a query: …
Suggested Courses

765 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question