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COleDataObject Class

Used in data transfers for retrieving data in various formats from the Clipboard, through drag and drop, or from an embedded OLE item.

class COleDataObject




Constructs a COleDataObject object.




Attaches the specified OLE data object to the COleDataObject.


Attaches the data object that is on the Clipboard.


Prepares for one or more subsequent GetNextFormat calls.


Detaches the associated IDataObject object.


Copies data from the attached OLE data object in a specified format.


Copies data from the attached OLE data object into a CFile pointer in the specified format.


Copies data from the attached OLE data object into an HGLOBAL in the specified format.


Returns the next data format available.


Checks whether data is available in a specified format.


Detaches and releases the associated IDataObject object.

COleDataObject does not have a base class.

These kinds of data transfers include a source and a destination. The data source is implemented as an object of the COleDataSource class. Whenever a destination application has data dropped in it or is asked to perform a paste operation from the Clipboard, an object of the COleDataObject class must be created.

This class enables you to determine whether the data exists in a specified format. You can also enumerate the available data formats or check whether a given format is available and then retrieve the data in the preferred format. Object retrieval can be accomplished in several different ways, including the use of a CFile, an HGLOBAL, or an STGMEDIUM structure.

For more information, see the STGMEDIUM structure in the Windows SDK.

For more information about using data objects in your application, see the article Data Objects and Data Sources (OLE).

Header: afxole.h

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