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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.
HRESULT OleCreateLinkFromData(
LPDATAOBJECT pSrcDataObj,
| //Points to data transfer object used to create linked object
| REFIID riid,
| //Interface to be used to communicate with the new object
| DWORD renderopt,
| //OLERENDER value
| LPFORMATETC pFormatEtc,
| //FORMATETC value, depends on OLERENDER value
| LPOLECLIENTSITE pClientSite,
| //Points to IOleClientSite instance
| LPSTORAGE pStg,
| //Pointer to an IStorage instance used as the object storage
| LPVOID FAR* ppvObj
| //On return, points to requested object
| );
|
|
Parameters
pSrcDataObj
Points to the data transfer object from which the linked object is to be
created.
riid
Identifies the interface the caller later uses to communicate with the new
object (usually IID_IOleObject).
renderopt
Specifies a 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
Comments section below.
pFormatEtc
Specifies 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
Points to an instance of IOleClientSite, the primary interface through which the object will request services from
its container. May be NULL.
pStg
Points to an instance of the IStorage interface to be used as the storage for the object. This parameter may not be
NULL.
ppvObj
Receives a pointer to the interface requested in riid on the newly created object on return.
Return Values
S_OK
Indicates the linked object was created successfully.
CLIPBRD_E_CANT_OPEN
Indicates not able to open the clipboard.
OLE_E_CANT_GETMONIKER
Indicates not able to extract the object's moniker.
OLE_E_CANT_BINDTOSOURCE
Indicates not able to bind to source. Binding is necessary to get the cache's
initialization data.
Comments
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
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. However, values of renderopt also specifically affect 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
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