FVWM: Detecting FixedPosition windows

I would like to make a function to toggle a window between fixed and movable styles, e.g. DestroyFunc ToggleMovable AddToFunc ToggleMovable + I ThisWindow (FixedPosition) WindowStyle VariablePosition + I TestRc (NoMatch) WindowStyle FixedPosition But of course there is no FixedPosition

FVWM: Making FvwmButtons only appear on one Page

I'm certain I had done this in the past but I can't seem to dredge it up from the archives, wiki, or forums... I have a FvwmButton Panel called NavButtons that appears on all my pages (120x480+0+0). In addition I want another panel called MixerButtons (controlling alsa) that I only