NAME

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

SYNTAX

       Widget XtOpenApplication(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(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 variable 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 application_name NULL, the
       specified widget_class, 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.

SEE ALSO

       XtAppInitialize(3), XtVaAppInitialize(3)
       X Toolkit Intrinsics - C Language Interface
       Xlib - C Language X Interface