Call this function to fill the specified COleDataSource object with all the data that would be copied to the Clipboard if you called CopyToClipboard (the same data would also be transferred if you called DoDragDrop).
void GetClipboardData( COleDataSource* pDataSource, BOOL bIncludeLink = FALSE, LPPOINT lpOffset = NULL, LPSIZE lpSize = NULL );
This function calls the GetEmbedSourceData member function to get the native data for the OLE item and calls the AddOtherClipboardData member function to get the presentation format and any supported conversion formats. If bIncludeLink is TRUE, the function also calls GetLinkSourceData to get the link data for the item.
Override this function if you want to put formats in a COleDataSource object before or after those formats supplied by CopyToClipboard.