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UCOMIStream stream = null;
  
CreateStreamOnHGlobal(Marshal.StringToHGlobalUni(value), true, out stream);
   
if(stream != null)
  
{
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      (IPersistStreamInit)WebBrowser.Document;
  
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    persistentStreamInit = null;
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static extern void CreateStreamOnHGlobal(IntPtr hGlobal,
    Boolean fDeleteOnRelease, [Out] out UCOMIStream pStream);
  
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public interface IPersistStreamInit
{
    void GetClassID([In, Out] ref Guid pClassID);
  
    [return: MarshalAs(UnmanagedType.I4)] [PreserveSig]
    int IsDirty();
  
    void Load([In, MarshalAs(UnmanagedType.Interface)] UCOMIStream pstm);
    void Save([In, MarshalAs(UnmanagedType.Interface)] UCOMIStream pstm,
 


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