Microsoft KB Archive/152533

= CLIBIN.EXE Converting COleClientItem into CLongBinary =

Article ID: 152533

Article Last Modified on 11/21/2006

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APPLIES TO

 Microsoft Foundation Class Library 4.2, when used with:  Microsoft Visual C++ 4.0 Standard Edition

 Microsoft Visual C++ 4.1 Subscription 

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This article was previously published under Q152533



SUMMARY
CLIBIN.EXE is a Microsoft Foundation Class sample that demonstrates how to write the data from an OLE Embedded Item to an OLE Object field in an Access 7.0 Database. This particular sample uses the MFC/ODBC classes.

The following files are available for download from the Microsoft Download Center:

Clibin.exe

For additional information about how to download Microsoft Support files, click the following article number to view the article in the Microsoft Knowledge Base:

119591 How to Obtain Microsoft Support Files from Online Services

Microsoft scanned this file for viruses. Microsoft used the most current virus-detection software that was available on the date that the file was posted. The file is stored on security-enhanced servers that help to prevent any unauthorized changes to the file.

NOTE: Use the -d option when running CLIBIN.EXE to decompress the file and recreate the proper directory structure.



MORE INFORMATION
This sample writes the OLE Embedded Item's data to an Access OLE Object field from within the Container App's OnInsertItem member of the CView class. There is an Access database that goes along with this sample located in the project's directory called "longbin.mdb." Remember to register this .mdb file with the ODBC Administrator.

The following code demonstrates how to accomplish this procedure:

Sample Code
//////////////////////////////////////////////////////////////////    // Extract COleClientItem data and write it out to an Access Field // m_pSet is the recordset object // The recordset's CLongBinary member is: m_longbin // pItem is the COleClientItem object ( embed item )

/****************************************************************/    //NOTE: This is a constant large enough for an average Winword // document. Increase this number if the item you will be   // inserting is larger!!!!!!!! const int DOCSIZE = 100000;

LPPERSISTSTORAGE pPersist = NULL; LPLOCKBYTES pLockBytes = NULL; LPSTORAGE pStorage = NULL; LPVOID pVoid = NULL; HRESULT hr = S_OK;

// make sure the recordset is in Add mode m_pSet->AddNew;

// free the current memory of the CLongBinary GlobalFree( m_pSet->m_longbin.m_hData );

// pItem ( the COleClientItem object ) has a contained IOleObject // interface called m_lpObject. // Call QI to get the OLE objects data. if( FAILED( pItem->m_lpObject->QueryInterface( IID_IPersistStorage,                                              (LPVOID*)&pPersist ) ) ) {       AfxMessageBox( _T( "interface not found" ) ); return; }

// Alloc the CLongBinary if( ( m_pSet->m_longbin.m_hData = GlobalAlloc( GMEM_MOVEABLE, DOCSIZE ) ) == NULL ) {       AfxMessageBox( _T( "memory error" ) ); goto term1; // special error condition clean-up label }

// Now lock it so we can write to it. if( ( pVoid = GlobalLock( m_pSet->m_longbin.m_hData ) ) == NULL ) {       AfxMessageBox( _T( "memory error" ) ); goto term1; // special error condition clean-up label }

// Create ILockBytes to be converted to an IStorage if( FAILED( CreateILockBytesOnHGlobal( m_pSet->m_longbin.m_hData,                                           FALSE, &pLockBytes ) ) ) {       AfxMessageBox( _T( "interface not found" ) ); goto term1; // special error condition clean-up label }

// Convert the ILockBytes to an IStorage if( FAILED( StgCreateDocfileOnILockBytes( pLockBytes, STGM_DIRECT              | STGM_CREATE | STGM_READWRITE | STGM_SHARE_EXCLUSIVE,                                                        0, &pStorage ) ) ) {       AfxMessageBox( _T( "interface not found" ) ); goto term2; // special error condition clean-up label }

// Now we can write the item's persistent data into the storage // we've provided. if( FAILED( pPersist->Save( pStorage, FALSE ) ) ) {       AfxMessageBox( _T( "Save failed" ) ); goto term3; // special error condition clean-up label }

// manage the field state for CLongBinary RFX m_pSet->SetFieldDirty( &m_pSet->m_longbin, TRUE ); m_pSet->SetFieldNull( &m_pSet->m_longbin, FALSE );

// set the CLongBinary length m_pSet->m_longbin.m_dwDataLength = GlobalSize(m_pSet->m_longbin.m_hData );

// Update the datasource m_pSet->Update;

// clean-up GlobalFree( m_pSet->m_longbin.m_hData ); pStorage->Release; pLockBytes->Release; pPersist->Release; return;

Additional query words: 4.00 4.10

Keywords: kbdownload kbcode kbdatabase kbfile kbsample KB152533

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