Unhandled exception at 0x7737e73e in Recovery Module.exe: 0xC0000005: Access violation writing location 0x00001012.

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//#include <stdafx.h>
#include <stdio.h>
#include<conio.h>

#include <windows.h>
#include<shobjidl.h>
#include <ole2.h>
#include<objidl.h>
#define BUFFERSIZE 1024

EXTERN_C void wmain()
{
HRESULT hr ;
IStorage *pStg;
IStorage* pStg1;
IStorage *pStg2;
WCHAR *pwszError = L"";

IStream *pSt=NULL;

hr = StgOpenStorageEx( L"E:\\Root.stg",
STGM_READ|STGM_SHARE_DENY_WRITE,
STGFMT_DOCFILE,
0, NULL, 0,
IID_IPropertySetStorage,
reinterpret_cast<void**>(&pStg) );
if(hr==S_OK)
printf("Storage opened");

hr=pStg->OpenStream(L"Rodies.mp3",NULL,STGM_DIRECT | STGM_CREATE | STGM_READWRITE | STGM_SHARE_EXCLUSIVE,0,(void**)&pStg);
if(hr==S_OK)
printf("Stream opened");
else
printf("Not Opened");

_getch();

}

Posted 20-Mar-11 20:43pm

Vinayak Pingale

Updated 21-Mar-11 8:11am

v4

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Comments

Vinayak Pingale 21-Mar-11 2:51am

the following error is shown:

Error 1 error C2664: 'IStorage::OpenStream' : cannot convert parameter 5 from 'void **' to 'IStream **' c:\users\sumit\documents\visual studio 2008\projects\recovery module\recovery module\recovery.cpp 32

Sergey Alexandrovich Kryukov 21-Mar-11 3:17am

Well, comment this line 32 in your code; why making people guess?!
--SA

[no name] 21-Mar-11 3:36am

This line reinterpret_cast<void**>(&pStg)?
Try (void**)&pStg

2 solutions

Solution 1

its becuase IStorage is not a valid object. can you show us the initialization OpenStream

Posted 20-Mar-11 21:14pm

Himansu sekhar bal

Comments

Vinayak Pingale 21-Mar-11 14:15pm

First i have opened already existing storage (.stg) using that storage pointer i have tried to open stream present in the storage.

but i am getting access violation error " 0xC0000005: Access violation writing location 0x00001012."
is it due to the modes that i am using while opening the stream

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mbue · Accepted Answer · 2011-03-21T11:57:00

* Dont forget that the REFIID corresponds to the interface you want:
IID_IPropertySetStorage wants IPropertySetStorage*
IID_IStorage wants IStorage*
* Dont forget to release interfaces after usage.
* Dont forget use interfaces only valid if the return value (HRESULT) == S_OK.
This looks better:

IStorage*    pStorage;
IStream*    pStream;
HRESULT      hr;

hr = StgOpenStorageEx
      (
        L"E:\\Root.stg",
        STGM_READ|STGM_SHARE_DENY_WRITE,
        STGFMT_DOCFILE,
        0, NULL, 0,
        IID_IStorage,
        (void**)&pStorage
      );

if(S_OK==hr)
{
  printf("Storage opened");

  if(S_OK==pStorage->OpenStream(L"Rodies.mp3",NULL,STGM_DIRECT | STGM_CREATE | STGM_READWRITE | STGM_SHARE_EXCLUSIVE,0,(void**)&pStream))
  {
    printf("Stream opened");
    pStream->Release();
  }
  else
  {
    printf("Not Opened");
  }
  pStorage->Release();
}

_getch();

Good luck.