IOleParentUndoUnit::FindUnit method (ocidl.h)

Article
10/13/2021

Indicates whether the specified unit is a child of this undo unit or one of its children, that is if the specified unit is part of the hierarchy in this parent unit.

Syntax

HRESULT FindUnit(
  [in] IOleUndoUnit *pUU
);

Parameters

[in] pUU

An IOleUndoUnit pointer to the undo unit to be found.

Return value

This method returns S_OK if the specified undo unit is in the hierarchy subordinate to this parent; otherwise, S_FALSE.

Remarks

This is typically called by the undo manager in its implementation of its IOleUndoManager::DiscardFrom method in the rare event that the unit being discarded is not a top-level unit. The parent unit should look in its own list first, then delegate to each child that is also a parent unit, as determined by doing a IUnknown::QueryInterface for IOleParentUndoUnit.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	ocidl.h