IVsTextBuffer::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.

Remarks

COM Signature

From textmgr.idl:

C++

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

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