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.