IOleParentUndoUnit::FindUnit
Indicates if
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.
HRESULT FindUnit(
|
IOleUndoUnit* pUU |
//Pointer to
the undo unit to be found |
|
); |
|
Parameters
pUU
[in] Pointer to the undo unit to be found.
Return Values
S_OK
The specified
undo unit is in the hierarchy subordinate to this parent.
S_FALSE
The specified
undo unit is not part of the hierarchy under this parent. An error indicates an
RPC failure condition.
Remarks
This is
typically called by the undo manager in its implementation of its 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 QueryInterface for IOleParentUndoUnit.
See Also