IFileDocument.CanUndo Property

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Getting property value:

Automation:

bool value = obj.CanUndo;

Native (C++):

HRESULT get_ CanUndo ( [out, retval] VARIANT_BOOL * val) ;

Parameters

valPointer to a variable that receives a property value.

Return Value

Automation:True if you can call the Redo method and False otherwise.Native: S_OK or standard OLE error code.

Remarks

Determine if you can call the IFileDocument.Undo method.

Examples

Sample implementation of the Undo method

C++Copy Code

void Undo(IFileDocument *pFileDocument)
{
  VARIANT_BOOL bCanUndo;

  pFileDocument->get_CanUndo(&bCanUndo);
  if (bCanUndo == VARIANT_TRUE)
    pFileDocument->Undo();
}

Sample implementation of the Undo method

C#Copy Code

public void Undo(IFileDocument fdoc)
{
  if (fdoc.CanUndo) 
    fdoc.Undo();
}

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