Here is a list of all struct and union fields with links to the structures/unions they belong to:

### - o -

- observingVisible : Cocoa_WindowListener
- offset : SDL_HapticPeriodic
- Offset : SDL_VideoData
- ofs : input_t
- OnAppActivated() : sealed
- OnBackButtonPressed() : sealed
- OnCharacterReceived() : sealed
- OneOverQ : XAUDIO2_FILTER_PARAMETERS
- OnExiting() : sealed
- OnKeyDown() : sealed
- OnKeyUp() : sealed
- OnLogicalDpiChanged() : sealed
- OnlyHasDefaultInputDevice : SDL_AudioDriverImpl
- OnlyHasDefaultOutputDevice : SDL_AudioDriverImpl
- OnMouseMoved() : sealed
- OnOrientationChanged() : sealed
- OnPointerEntered() : sealed
- OnPointerExited() : sealed
- OnPointerMoved() : sealed
- OnPointerPressed() : sealed
- OnPointerReleased() : sealed
- OnPointerWheelChanged() : sealed
- OnResuming() : sealed
- OnSuspending() : sealed
- OnVisibilityChanged() : sealed
- OnWindowActivated() : sealed
- OnWindowClosed() : sealed
- OnWindowEnter : SDL_VideoDevice
- OnWindowSizeChanged() : sealed
- opacity : DFB_WindowData
- OpenDevice : SDL_AudioDriverImpl
- opened : SDL_AudioDevice
- ordblks : mallinfo
- otherMouseDown: : Cocoa_WindowListener
- otherMouseDragged: : Cocoa_WindowListener
- otherMouseUp: : Cocoa_WindowListener
- output : SDL_PrivateAudioData
- OutputChannels : XAUDIO2_EFFECT_DESCRIPTOR
- outputDeviceCount : SDL_AudioDriver
- outputDevices : SDL_AudioDriver
- outputDevicesRemoved : SDL_AudioDriver
- owner : SDL_mutex
- SDL_OpenAudio : SDL_DYNAPI_jump_table
- SDL_OUT_BYTECAP : SDL_DYNAPI_jump_table
- SDL_OUT_Z_CAP : SDL_DYNAPI_jump_table