XtOpenApplication(3Xt)

     NAME
          XtOpenApplication, XtVaOpenApplication - initialize, open,
          or close a display

     SYNTAX
          Widget XtOpenApplication(app_context_return,
          application_class, options, num_options, argc_in_out,
          argv_in_out, fallback_resources, widget_class, args,
          num_args)
                XtAppContext* app_context_return;
                String application_class;
                XrmOptionDescRec* options;
                Cardinal num_options;
                int* argc_in_out;
                String* argv_in_out;
                String* fallback_resources;
                WidgetClass widget_class;
                ArgList args;
                Cardinal num_args;

          Widget XtVaOpenApplication(app_context_return,
          application_class, options, num_options, argc_in_out,
          argv_in_out, fallback_resources, widget_class, ...)
                XtAppContext* app_context_return;
                String application_class;
                XrmOptionDescRec* options;
                Cardinal num_options;
                int* argc_in_out;
                String* argv_in_out;
                String* fallback_resources;
                WidgetClass widget_class;

     ARGUMENTS
          app_context_return
                    Specifies the application context.

          application_class
                    Specifies the class name of this application,
                    which usually is the generic name for all
                    instances of this application.

          options   Specifies how to parse the command line for any
                    application-specific resources.  The options
                    argument is passed as a parameter to
                    XrmParseCommand.  For further information, see
                    Xlib - C Language X Interface.

          num_options
                    Specifies the number of entries in the options
                    list.

          argc_in_out
                    Specifies a pointer to the number of command line
                    parameters.

          argv_in_out
                    Specifies the command line parameters.

          fallback_resources
                    Specifies resource values to be used if the
                    application class resource file cannot be opened
                    or read, or NULL.

          widget_class
                    Specifies the widget class of the shell to be
                    created.

          args      Specifies the argument list to override any other
                    resource specification for the created shell
                    widget.

          num_args  Specifies the number of entries in the argument
                    list.

          ...       Specifies the NULL-terminated variable-length
                    argument list to override any other resource
                    specification for the created shell widget.

     DESCRIPTION
          The XtOpenApplication function calls XtToolkitInitialize
          followed by XtCreateApplicationContext, then calls
          XtOpenDisplay with display_string NULL and application_name
          NULL, and finally calls XtAppCreateShell with appcation_name
          NULL, widget_class applicationShellWidgetClass, and the
          specified args and num_args and returns the created shell.
          The modified argc and argv returned by XtDisplayInitialize
          are returned in argc_in_out and argv_in_out. If
          app_context_return is not NULL, the created application
          context is also returned. If the display specified by the
          command line cannot be opened, an error message is issued
          and XtOpenApplication terminates the application. If
          fallback_resources is non-NULL, XtAppSetFallbackResources is
          called with the value prior to calling XtOpenDisplay.

          XtAppInitialize and XtVaAppInitialize have been superceded
          by XtOpenApplication and XtVaOpenApplication respectively.
          X Toolkit Intrinsics - C Language Interface
          Xlib - C Language X Interface