OleCreateFromFile function (ole2.h)

Creates an embedded object from the contents of a named file.

Syntax

HRESULT OleCreateFromFile(
  [in]  REFCLSID        rclsid,
  [in]  LPCOLESTR       lpszFileName,
  [in]  REFIID          riid,
  [in]  DWORD           renderopt,
  [in]  LPFORMATETC     lpFormatEtc,
  [in]  LPOLECLIENTSITE pClientSite,
  [in]  LPSTORAGE       pStg,
  [out] LPVOID          *ppvObj
);

Parameters

[in] rclsid

This parameter is reserved and must be CLSID_NULL.

[in] lpszFileName

Pointer to a string specifying the full path of the file from which the object should be initialized.

[in] riid

Reference to the identifier of the interface the caller later uses to communicate with the new object (usually IID_IOleObject, defined in the OLE headers as the interface ID of 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. The OLERENDER value chosen affects the possible values for the lpFormatEtc parameter.

[in] lpFormatEtc

Depending on which of the OLERENDER flags is used as the value of renderopt, pointer to one of the FORMATETC enumeration values. Refer also to the OLERENDER enumeration for restrictions.

[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.

Remarks

The OleCreateFromFile function creates a new embedded object from the contents of a named file. If the ProgID in the registration database contains the PackageOnFileDrop key, it creates a package. If not, the function calls the GetClassFile function to get the CLSID associated with the lpszFileName parameter, and then creates an OLE 2-embedded object associated with that CLSID. The rclsid parameter of OleCreateFromFile will always be ignored, and should be set to CLSID_NULL.

As for other OleCreateXxx functions, the newly created object is not shown to the user for editing, which requires a DoVerb operation. It is used to implement insert file operations.

Requirements

See also

GetClassFile