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XtDisplayInitialize(3Xt)	     X11R5	      XtDisplayInitialize(3Xt)

NAME
       XtDisplayInitialize, XtOpenDisplay, XtDatabase, XtCloseDisplay - ini‐
       tialize, open, or close a display

SYNTAX
       void XtToolkitInitialize()

       void XtDisplayInitialize(app_context, display, application_name, appli‐
       cation_class,
			      options, num_options, argc, argv)
	     XtAppContext app_context;
	     Display *display;
	     String application_name;
	     String application_class;
	     XrmOptionDescRec *options;
	     Cardinal num_options;
	     Cardinal *argc;
	     String *argv;

       Display *XtOpenDisplay(app_context, display_string, application_name,
       application_class,
			      options, num_options, argc, argv)
	      XtAppContext app_context;
	      String display_string;
	      String application_name;
	      String application_class;
	      XrmOptionDescRec *options;
	      Cardinal num_options;
	      Cardinal *argc;
	      String *argv;

       void XtCloseDisplay(display)
	     Display *display;

       XrmDatabase XtDatabase(display)
	     Display *display;

ARGUMENTS
       argc	 Specifies a pointer to the number of command line parameters.

       argv	 Specifies the command line parameters.

       app_context
		 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.

       application_name
		 Specifies the name of the application instance.

       display	 Specifies the display.	 Note that a display can be in at most
		 one application context.

       num_options
		 Specifies the number of entries in the options list.

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

DESCRIPTION
       The function builds the resource database, calls the Xlib function to
       parse the command line, and performs other per display initialization.
       After has been called, argc and argv contain only those parameters that
       were not in the standard option table or in the table specified by the
       options argument.  If the modified argc is not zero, most applications
       simply print out the modified argv along with a message listing the
       allowable options.  On UNIX-based systems, the application name is usu‐
       ally the final component of argv[0].  If the synchronize resource is
       for the specified application, calls the Xlib function to put Xlib into
       synchronous mode for this display connection.  If the reverseVideo
       resource is the Intrinsics exchange and for widgets created on this
       display.	 (See Section 9.6.1).

       The function calls the specified display name.  If display_string is
       NULL, uses the current value of the -display option specified in argv
       and if no display is specified in argv, uses the user's default display
       (on UNIX-based systems, this is the value of the DISPLAY environment
       variable).

       If this succeeds, it then calls and pass it the opened display and the
       value of the -name option specified in argv as the application name.
       If no name option is specified, it uses the application name passed to
       If the application name is NULL, it uses the last component of argv[0].
       returns the newly opened display or NULL if it failed.

       is provided as a convenience to the application programmer.

       The function closes the specified display as soon as it is safe to do
       so.  If called from within an event dispatch (for example, a callback
       procedure), does not close the display until the dispatch is complete.
       Note that applications need only call if they are to continue executing
       after closing the display; otherwise, they should call or just exit.

       The function returns the fully merged resource database that was built
       by associated with the display that was passed in.  If this display has
       not been initialized by the results are not defined.

SEE ALSO
       XtAppCreateShell(3Xt), XtCreateApplicationContext(3Xt)
       X Toolkit Intrinsics - C Language Interface
       Xlib - C Language X Interface

						      XtDisplayInitialize(3Xt)
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