IVsTextBuffer.GetUndoManager Method
Returns the undo manager for this buffer.
Namespace: Microsoft.VisualStudio.TextManager.Interop
Assembly: Microsoft.VisualStudio.TextManager.Interop (in Microsoft.VisualStudio.TextManager.Interop.dll)
Syntax
'宣言
Function GetUndoManager ( _
<OutAttribute> ByRef ppUndoManager As IOleUndoManager _
) As Integer
'使用
Dim instance As IVsTextBuffer
Dim ppUndoManager As IOleUndoManager
Dim returnValue As Integer
returnValue = instance.GetUndoManager(ppUndoManager)
int GetUndoManager(
out IOleUndoManager ppUndoManager
)
int GetUndoManager(
[OutAttribute] IOleUndoManager^% ppUndoManager
)
function GetUndoManager(
ppUndoManager : IOleUndoManager
) : int
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:
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.
Permissions
- Full trust for the immediate caller. This member cannot be used by partially trusted code. For more information, see Using Libraries from Partially Trusted Code.