How to build a boundary on a Mosaic dataset

public void BuildBoundaryOnMD(IMosaicDataset theMosaicDataset)
{
    // The mosaic dataset operation interface is used to perform operations on 
    // a mosaic dataset.
    IMosaicDatasetOperation theMosaicDatasetOperation = (IMosaicDatasetOperation)
        (theMosaicDataset);

    // Create a build boundary parameters object.
    IBuildBoundaryParameters boundaryArgs = new BuildBoundaryParametersClass();
    // Set flags that control boundary generation.
    boundaryArgs.AppendToExistingBoundary = true;
    // Use the mosaic dataset operation interface to build the boundary.
    theMosaicDatasetOperation.BuildBoundary(boundaryArgs, null);
}

Public Sub BuildBoundaryOnMD(ByVal theMosaicDataset As IMosaicDataset)
    ' The mosaic dataset operation interface is used to perform operations on
    ' a mosaic dataset.
    Dim theMosaicDatasetOperation As IMosaicDatasetOperation =
    DirectCast((theMosaicDataset), IMosaicDatasetOperation)
    
    ' Create a build boundary parameters object.
    Dim boundaryArgs As IBuildBoundaryParameters = New BuildBoundaryParametersClass()
    ' Set flags that control boundary generation.
    boundaryArgs.AppendToExistingBoundary = True
    ' Use the mosaic dataset operation interface to build the boundary.
    theMosaicDatasetOperation.BuildBoundary(boundaryArgs, Nothing)
End Sub