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OleCreateLinkFromData function (ole2.h)

  • Makale

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

Syntax

HRESULT OleCreateLinkFromData(
  [in]  LPDATAOBJECT    pSrcDataObj,
  [in]  REFIID          riid,
  [in]  DWORD           renderopt,
  [in]  LPFORMATETC     pFormatEtc,
  [in]  LPOLECLIENTSITE pClientSite,
  [in]  LPSTORAGE       pStg,
  [out] LPVOID          *ppvObj
);

Parameters

[in] pSrcDataObj

Pointer to the IDataObject interface on the data transfer object from which the linked object is to be created.

[in] riid

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).

[in] renderopt

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.

[in] pFormatEtc

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.

[in] pClientSite

Pointer to an instance of IOleClientSite, the primary interface through which the object will request services from its container. This parameter can be NULL.

[in] pStg

Pointer to the IStorage interface on the storage object. This parameter cannot be NULL.

[out] ppvObj

Address of pointer variable that receives the interface pointer requested in riid. Upon successful return, ppvObj contains the requested interface pointer on the newly created object.

Return value

This function returns S_OK on success. Other possible values include the following.

Return code Description
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.

Requirements

Requirement Value
Minimum supported client Windows 2000 Professional [desktop apps only]
Minimum supported server Windows 2000 Server [desktop apps only]
Target Platform Windows
Header ole2.h
Library Ole32.lib
DLL Ole32.dll

See also

OleCreateLink