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IPersistStream (Interfaces)
.
C# Definition:
[ComImport]
[Guid("TODO")]
//TODO: Insert [InterfaceType(ComInterfaceType.InterfaceIsIUnknown)] if this doesn't derive from IDispatch
interface IPersistStream {
TODO;
}
VB Definition:
#Region "IPersistStream Interface Definition"
'/// <summary>
'/// Provides methods for reading from a simple serial stream (IStream).
'/// Filter data is read-only, therefore all methods associated with
'/// write operations should return E_NOTIMPL.
'/// </summary>
<ComImport(), _
InterfaceType(ComInterfaceType.InterfaceIsIUnknown), _
Guid("00000109-0000-0000-C000-000000000046")> _
Public Interface IPersistStream
'sub GetClassID(<Out()> ByRef pClassID As Guid)
'/// <summary>
'/// Checks the object for changes since it was last saved.
'/// In the case of filters, this should always return either
'/// S_FALSE or E_NOTIMPL, because the stream is read-only.
'/// </summary>
<PreserveSigAttribute()> Function IsDirty() As IFilterReturnCodes
'/// <summary>
'/// Initializes an object from the stream where it was previously saved.
'/// Returns one of the following:
'/// * S_OK: The object was successfully loaded.
'/// * S_OUTOFMEMORY: The object was not loaded due to a lack of memory.
'/// * S_FAIL: The object was not loaded due to some reason other than
'/// a lack of memory.
'/// NOTE: Since we are reading from a stream, you would normally not
'/// perform any actual loading of data is performed within this
'/// method. Instead, use it to initialize the load operation,
'/// such as in saving a reference to the supplied stream for
'/// later use within the GetChunk method.
'/// </summary>
Function Load(<[In](), MarshalAs(UnmanagedType.Interface)> ByVal pStm As Object) As IFilterReturnCodes
'/// <summary>
'/// Saves an object to the specified stream. Filters are read-only,
'/// so this method should always return E_NOTIMPL.
'/// </summary>
Function Save(<[In](), MarshalAs(UnmanagedType.Interface)> ByRef pStm As Object, _
<[In](), MarshalAs(UnmanagedType.Bool)> ByVal fClearDirty As Boolean) As IFilterReturnCodes
'/// <summary>
'/// Returns the size in bytes of the stream needed to save the
'/// object. Since a filter's data is read-only, this method
'/// should always return E_NOTIMPL.
'/// </summary>
<PreserveSigAttribute()> Function GetSizeMax(<Out()> ByRef pcbSize As UInt64) As IFilterReturnCodes
End Interface
#End Region
User-Defined Types:
None.
Notes:
None.
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