C# Definition:

    [ComImport]
    [Guid("0000013A-0000-0000-C000-000000000046")]
    [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
    public interface IPropertySetStorage
    {
        [PreserveSig]
        int Create(
        [In, MarshalAs(UnmanagedType.Struct)] ref System.Guid rfmtid,
        [In] IntPtr pclsid,
        [In] int grfFlags,
        [In] int grfMode,
        ref IPropertyStorage propertyStorage);

        [PreserveSig]
        int Open(
        [In, MarshalAs(UnmanagedType.Struct)] ref System.Guid rfmtid,
        [In] int grfMode,
        [Out] IPropertyStorage propertyStorage);
    }

VB Definition:

User-Defined Types:

None.

Notes:

To preserve HRESULT return values, the PreserveSig attribute is needed. An alternate signature would omit PreserveSig and return void. With that signature, the interop marshaler would convert failure HRESULT values to COMException.

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