IncludedScriptContexts is an option to GUIRun and related functions that can extend the active $ContextPath that Script blocks within a definition will use.
InitialArguments is an option to Widget which specifies the argument list to use when instantiating this widget definition.
InvokeMethod[name, {} | content] calls a widget method on the wrapping contexted widget.InvokeMethod[{target, name}, content] calls a widget method on the specified target ...
InvokeThread is an option to GUIKit symbols which specifies what thread the invocation should execute on.
InvokeWait is an option to GUIKit symbols which determines whether a threaded invocation should wait for a result or continue on immediately without a response.
Name
(GUIKit Package Symbol) Name is an option to GUIKit expression functions and identifies a string name with which to register the widget instance in the active widget registry.
PropertyValue[name] gets a widget property value.PropertyValue[{target, name}] gets a widget property value, specifying the target widget.PropertyValue[{target, name, index}] ...
ReleaseGUIObject[obj] closes and terminates all resources of a live GUIObject instance.
ReleaseMethod is an option to GUIRun and related functions that determines when a GUIObject is released.
ReturnScript is an option to GUIRunModal which specifies a string version of Mathematica code to execute when the window ends its modal session and becomes the return value ...