IVsTextLines.GetUndoManager Method (IOleUndoManager)

 

Returns the undo manager for this buffer.

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

int GetUndoManager(
	out 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.

From textmgr.idl:

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

This method could require considerable resources, 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 as in Visual Basic.

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