Order of Operations

└── Container (ComboBox)
│     └── SelectionChanged Event
│           │
│           └── Format Controls (Class)
│                 │
│                 └── SetControls (Method)
│                       └── Load 
│                             └── Media Type
│                             └── Video Codec
│                             └── Audio Codec
│                             └── Subtitle Codec
│                               └── Item Sources
│                               └── Selected Item
│
│
└── Video/Subtitle/Audio Codec (ComboBox)
      └── SelectionChanged Event
            │
            └── Video/Subtitle/Audio Controls (Class)
                  │
                  └── SetControls (Method)
                        └── Load
                              └── Codec
                              └── Encode Speed
                              └── Quality
                              └── Pass
                              └── Optimize
                              └── Channel
                              └── Sample Rate
                              └── Bit Depth
                                └── Item Sources
                                └── Selected Items
                                └── Checked
                                └── Unchecked
                                └── Enabled
                                └── Disabled