# OleCreateLinkFromData

Creates a linked object from a data transfer object retrieved either from the clipboard or as part of an OLE drag-and-drop operation.

WINOLEAPI OleCreateLinkFromData(

LPDATAOBJECT pSrcDataObj, | //Pointer to data transfer objectt
REFIID riid, | //Reference to the identifier of the interface to be used to communicate with the new object
DWORD renderopt, | //OLERENDER value
LPFORMATETC pFormatEtc, | //Pointer to a FORMATETC structure
LPOLECLIENTSITE pClientSite, | //Pointer to an interface
LPSTORAGE pStg, | //Pointer to the object storage
LPVOID FAR* ppvObj | //Indirect pointer to requested object
); |

Parameters

pSrcDataObj
  [in] Pointer to the IDataObject interface on the data transfer object from which the linked object is to be created.
riid
  [in] Reference to the identifier of interface the caller later uses to communicate with the new object (usually IID_IOleObject, defined in the OLE headers as the interface identifier for IOleObject).
renderopt
  [in] Value from the enumeration OLERENDER that indicates the locally cached drawing or data-retrieval capabilities the newly created object is to have. Additional considerations are described in the following Remarks section.
pFormatEtc
  [in] Pointer to a value from the enumeration OLERENDER that indicates the locally cached drawing or data-retrieval capabilities the newly created object is to have. The OLERENDER value chosen affects the possible values for the pFormatEtc parameter.
pClientSite
  [in] Pointer to an instance of IOleClientSite, the primary interface through which the object will request services from its container. May be NULL.
pStg
  [in] Pointer to the IStorage interface on the storage object. This parameter may not be NULL.
ppvObj
  [out] Indirect pointer to the interface requested in riid on the newly created object on return.

Return Values

S_OK
  The linked object was created successfully.
CLIPBRD_E_CANT_OPEN
  Not able to open the clipboard.
OLE_E_CANT_GETMONIKER
  Not able to extract the object’s moniker.
OLE_E_CANT_BINDTOSOURCE
  Not able to bind to source. Binding is necessary to get the cache’s initialization data.

Remarks

The OleCreateLinkFromData function is used to implement either a paste-link or a drag-link operation. Its operation is similar to that of the OleCreateFromData function, except that it creates a link, and looks for different data formats. If the CF_LINKSOURCE format is not present, and either the FileName or FileNameW clipboard format is present in the data transfer object, OleCreateLinkFromData creates a package containing the link to the indicated file.

You use the renderopt and pFormatetc parameters to control the caching capability of the newly created object. For general information on how to determine what is to be cached, refer to the OLERENDER enumeration for a description of the interaction between renderopt and pFormatetc. There are, however, some additional specific effects of these parameters on the way OleCreateLinkFromData initializes the cache, as follows:

Value | Description
OLERENDER_DRAW, OLERENDER_FORMAT | If the presentation information is in the other formats in the source data object, this information is used. If the information is not present, the cache is initially empty, but will be filled the first time the object is run. No other formats are cached in the newly created object.
OLERENDER_NONE, OLERENDER_ASIS | Nothing is to be cached in the newly created object.

See Also

OleCreateLink