Here is a little script that works......the key is that one does not have access to the Home Window, but you can get the pointer to the overall JMP environment through << Top Parent. And it will remain viable as long as the window you go through stays available. So below is my solution to that.
x = New Window( " ");
win = Window( 1 ) << top parent;
x << show window(0);
win << on close(
New Window( "Goodbye :)", <<modal, Text Box( "Thanks for using JMP" ) );
quit("no save");
RunProgram( executable( "C:\Program Files\Windows Media Player\wmplayer.exe" ) );
);
Maybe someone else can come up with a better reference point to the top parent.
Jim