Comments by marukas31 (Top 1 by date)

Well, I think IPreviewHandler should solve the problem but I cannot find how to pass it to the IFileDialog while IFileDialog->Advice accepts IFileDialogEvents interface and even if I put IPreviewHandler into event handler map:

BEGIN_COM_MAP(CDlgEventHandler)
COM_INTERFACE_ENTRY(IFileDialogEvents)
COM_INTERFACE_ENTRY(IPreviewHandler)
END_COM_MAP()

and override its functions I do not get any calls to them :(