>I have 2 issues:
>1. When I close formA I wlays want FormB to close (otherwise it would be left dangling)

>2. Before I call FormB, it would be nice If I could identify if its already there, if It is just show it, otherwise do a Do Form

Just add a property ChildForm to FormA to store reference to FormB and set default value to .Null. For example this code will create/show FormB:

IF ISNULL(ThisForm.ChildForm) &&FormB is not created
  DO FORM "FormB.scx" NAME ThisForm.ChildForm LINKED &&Create child form and store reference
 ELSE
  ThisForm.ChildForm.Show() &&Show the form
ENDIF

Because form is created with LINKED option it will be automatically released if FormA is released.