Want to capture MouseMove in a DW after calling PopMenu

I have a dataWindow that will call popMenu depending on where the cursor is positioned.  The problem I'm having is that once I call popMenu, moving back over the dataWindow has no effect, because I no longer get the mouseMove event (I'm using pbm_dwnMouseMove) in the dataWindow while the popMenu is visible.  Is there an API call I can make to get this to work?  I've seen this type of thing work with Kodigo/PowerBuilder based projects, but I'm trying to get this to work in a straight PFC/PowerBuilder code base.  Using PowerBuilder 12.5.2 5602.