IPreviousVersionsInfo interface (shobjidl.h)

Exposes a method that checks for previous versions of server files or folders, stored for the purpose of reversion by the shadow copies technology provided with Windows Server 2003.

Inheritance

The IPreviousVersionsInfo interface inherits from the IUnknown interface. IPreviousVersionsInfo also has these types of members:

Methods

The IPreviousVersionsInfo interface has these methods.

Remarks

The CLSID, IID, and definition for this interface are shown in the following example.

// {596AB062-B4D2-4215-9F74-E9109B0A8153}
const CLSID CLSID_PreviousVersions = {0x596AB062, 0xB4D2, 0x4215, 
                             {0x9F, 0x74, 0xE9, 0x10, 0x9B, 0x0A, 0x81, 0x53}};

// {76e54780-ad74-48e3-a695-3ba9a0aff10d}
const IID IID_IPreviousVersionsInfo = {0x76E54780, 0xAD74, 0x48E3, 
                             {0xA6, 0x95, 0x3B, 0xA9, 0xA0, 0xAF, 0xF1, 0x0D}};

MIDL_INTERFACE("76e54780-ad74-48e3-a695-3ba9a0aff10d")
IPreviousVersionsInfo : public IUnknown
{
public:
    virtual HRESULT STDMETHODCALLTYPE AreSnapshotsAvailable( 
        /* [string][in] */ LPCWSTR pszPath,
        /* [in] */ BOOL fOkToBeSlow,
        /* [retval][out] */ BOOL *pfAvailable) = 0;
};

Note that the shadow copies technology does not store entire copies of older versions unless they are deleted; only the changed bits are stored.

Requirements