' Access to the Strokes property returns a copy of the Strokes object.
' This copy must be implicitly (via using statement) or explicitly
' disposed of in order to avoid a memory leak.
Using allStrokes As Strokes = mInkOverlay.Ink.Strokes
Dim bounds As Rectangle = allStrokes.GetBoundingBox()
' create a point at the center of bounding box
Dim center As Point = New Point(bounds.Left + (bounds.Width / 2), bounds.Top + (bounds.Height / 2))
allStrokes.Rotate(60.0F, center)
End Using