[2/4](try 3)strmbase: implement BaseControlWindow

[Aric Stewart]

try3: implement and use impl_from_*() as suggested by Nikolay Sivov
---
  dlls/strmbase/window.c  |  570 
+++++++++++++++++++++++++++++++++++++++++++++++
  include/wine/strmbase.h |   66 ++++++
  2 files changed, 636 insertions(+), 0 deletions(-)


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