   Rendering Problems in Multiple Windows
  I am programming a MDI application for windows using just the API (no MFC or VCL stuff). I''ve made a code that works nicely on a single window application, but when I use it on one of my child windows, the depth calculations don''t seem to work correctly.And I am pretty sure that I''m using the exactly same code that works in a single window.Any clue on what''s happening ? 