Updating ole object msaccess

Posted by / 09-Jun-2016 21:55

For this reason, Microsoft provides the Microsoft Foundation Class (MFC) Library, a set of ready-made classes that can be used to build container and server applications, and tools such as Visual C .The Microsoft Office Access 2007 relational database manager enables information workers to quickly track and report information with ease thanks to its interactive design capabilities that do not require deep database knowledge.In Chapter 15, "Importing and Exporting Information," you learned how Access can be a "good neighbor" by sharing data with other programs.In this chapter, you will learn how Access can work with other programs in a different way--by letting you link or embed information within a table.In short, this chapter teaches you how to take advantage of OLE, object linking and embedding, from within Access.By the time you finish this chapter, you will understand the following key concepts: OLE (sometimes pronounced o-lay) is an acronym for object linking and embedding.One remaining item is that before Access actually writes out the storage, it adds a stream to it that contains information that is lost in the process of Ole Convert IStorage To OLESTREAM/Ole Convert OLESTREAMTo IStorage.

Databases with embedded objects are larger than databases with linked objects.This means that to read an object back in the following steps have to be taken: DWORD dw Object Size = 0; DWORD dw Check Sum = 0; int i Header Size = 0; CLong Binary Doc* p Doc = NULL; CLong Binary Item* p Clone = NULL; LPSTREAM lp Obj Stream = NULL; LPOLE1STREAM lp Ole1Stream = NULL; LPOLECLIENTSITE lp Client Site = NULL; HGLOBAL hg Mem Object = NULL; HGLOBAL hg Access Header = NULL; HGLOBAL hg New Long Binary = NULL; LPBYTE lpb Mem Object = NULL; LPBYTE lpb Access Header = NULL; LPBYTE lpb New Long Binary= NULL; int n IDLast = 1; ULARGE_INTEGER ul Stream Size; // allocate enough memory to write access header to if( NULL == ( hg Access Header = Global Alloc(GMEM_MOVEABLE, sizeof( OLEOBJHDR ) 100 ))) // write the access-header if( 0 == ( i Header Size = Write Access Header(hg Access Header, m_p Selection-m_lp Object ))) // adjust size of memory-block according to Write Access Header() if ( NULL == ( hg Access Header = Global Re Alloc(hg Access Header, i Header Size, GMEM_MOVEABLE ))) // Alloc the memory to store the long binary if ( NULL == ( hg Mem Object = Global Alloc(GMEM_MOVEABLE | GMEM_DDESHARE, 0 ))) // create an IStream on top of the ILock Bytes // (indicate automatic deletion of HGLOBAL on Release) // IMPORTANT: This IStream* (and therewith the memory // will be released during Delete Ole Stream() if ( FAILED( :: Create Stream On HGlobal( hg Mem Object, TRUE, &lp Obj Stream ))) // convert the IStream to an IStorage ( ACCESS stores OLE Objects the OLE1 way) // in order to do so, we first have to wrap the OLE2 IStream into an OLE1 OLESTREAM // see MSDN Article: "More on Using Storage Objects in OLE" // NOTE: the Get() and Put() functions wrapped in the OLESTREAMVTBL will // access the newly opened stream using an IStream* variable if ( NULL == ( lp Ole1Stream = Create Ole1Stream( lp Obj Stream, 0 ))) // if the OLE object was not loaded from the DB, but rather // created using Create New Item(), or if the item was modified // after loading it from the DB, the m_lp Storage of the item // will not contain the updated item information, since it wasn't // yet saved to that IStorage.// in order to assure that m_lp Storage points to the updated // information, we force the item to save it's data.In this Microsoft Access video tutorial, you'll learn about adding an individual graphic to each record in MS Access.To get started using OLE objects in your own tables and forms, watch this MS Access video how-to.

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Each desktop object is an independent program entity that can interact with a user and also communicate with other objects on the desktop.

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  1. My question is, if I was to swap out the 6GB of Ram currently on the laptop to the 8GB option, would that make any meaningful difference or am I better off giving it to a computer expert and having them run a cleaning diagnostic on the computer (it's getting to the point where I'm getting a windows message popping up saying the computer is out of memory). D Open up Task manager, Go to the Performance Tab, Check the Ram Usage when you do the Caculations.