Saveas DXF Macro

We export many of our drawings to dxf for outside shops to use for laser work.  Sometimes we forget to re-export to DXF if we make a change to the original solidworks part and subsequent drawing.  Is there anyway to auto-export to export during a regular save?  Or possibly a saveas dxf macro button that when pushed will automatically overwrite the existing dxf?  Thanks in advance.SolidworksGeneral