ActiveX control to host Office documents

Quite interesting control Dsoframer.ocx can be found in this KB article - ActiveX control that acts as an ActiveX document container for hosting Office documents (including Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Microsoft Project, and Microsoft Visio documents).
Some interesting properties and methods:

// Generated .IDL file (by the OLE/COM Object Viewer) // // typelib filename:
DSOFRAMER.OCX

typedef enum {
dsoDialogNew = 0,
dsoDialogOpen = 1,
dsoDialogSave = 2,
dsoDialogSaveCopy = 3,
dsoDialogPrint = 4,
dsoDialogPageSetup = 5,
dsoDialogProperties = 6
} dsoShowDialogType;



typedef enum {
dsoFileNew = 0,
dsoFileOpen = 1,
dsoFileClose = 2,
dsoFileSave = 3,
dsoFileSaveAs = 4,
dsoFilePrint = 5,
dsoFilePageSetup = 6,
dsoFileProperties = 7,
dsoFilePrintPreview = 8
} dsoFileCommandType;


[id(0x00010013), propput, helpstring("Returns/sets whether a menu bar should be
displayed.")]
HRESULT Menubar([in] VARIANT_BOOL pbool);

[id(0x00010014), propput, helpstring("Returns/sets host application name (used
in embedding).")]
HRESULT HostName([in] BSTR pbstr);

[id(0x00010016), helpstring("Prints current document to specific printer with
settings.")]
HRESULT PrintOut(
[in, optional] VARIANT PromptUser,
[in, optional] VARIANT PrinterName,
[in, optional] VARIANT Copies,
[in, optional] VARIANT FromPage,
[in, optional] VARIANT ToPage,
[in, optional] VARIANT OutputFile);

[id(0x00000001), helpstring("Called when File menu item is selected by user (may
be canceled).")]
HRESULT OnFileCommand(
[in] dsoFileCommandType Item,
[in, out] VARIANT_BOOL* Cancel);

[id(0x00000002), helpstring("Called when document is opened or new document
added.")]
HRESULT OnDocumentOpened(
[in] BSTR File,
[in] IDispatch* Document);

[id(0x00000003), helpstring("Called when document is closed.")]
HRESULT OnDocumentClosed();