IVsTextStream::GetUndoManager Method (IOleUndoManager^)

Visual Studio 2015

Returns the undo manager for this buffer.

Namespace: Microsoft.VisualStudio.TextManager.Interop
Assembly: Microsoft.VisualStudio.TextManager.Interop (in Microsoft.VisualStudio.TextManager.Interop.dll)

Syntax

C++

int GetUndoManager(
	[OutAttribute] IOleUndoManager^% ppUndoManager
)

Parameters

ppUndoManager: Type: Microsoft.VisualStudio.OLE.Interop::IOleUndoManager^
[out] Pointer to the IOleUndoManager interface.

Return Value

Type: System::Int32

If the method succeeds, it returns S_OK. If it fails, it returns an error code.

Implements

IVsTextBuffer::GetUndoManager(IOleUndoManager^)

Remarks

COM Signature

From textmgr.idl:

C++

HRESULT IVsTextStream::GetUndoManager(
   [out] IOleUndoManager **ppUndoManager
);

This method could be expensive, depending upon the underlying implementation of the buffer. That is, it could be very difficult to calculate the size of the buffer if it is a virtual-line-oriented implementation of the buffer, as in Visual Basic.