How to detect when a form has FINISHED resizing

I need to detect when a form finishes resizing.  I have some code that needs to execute, but executing during the Resize event causes a loss of the resizing mouse click.  I need to be able to detect when the resize is finished, then execute my code.  I have tried subclassing the WM_SIZING and WM_SIZE messages, but this tells me the same as the resize event.  Does anyone know how to do this?  Thanks.