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XtDisplayInitialize(3)		 XT FUNCTIONS		XtDisplayInitialize(3)

       XtDisplayInitialize, XtOpenDisplay, XtDatabase, XtScreenDatabase,
       XtCloseDisplay -	initialize, open, or close a display

       #include	<X11/Intrinsic.h>

       void XtDisplayInitialize(XtAppContext app_context, Display *display,
	      const char *application_name, const char *application_class, Xr-
	      mOptionDescRec *options, Cardinal	num_options, int *argc,	char

       Display *XtOpenDisplay(XtAppContext app_context,	const char *dis-
	      play_string, const char *application_name, const char *applica-
	      tion_class, XrmOptionDescRec *options, Cardinal num_options, int
	      *argc, char **argv);

       void XtCloseDisplay(Display *display);

       XrmDatabase XtDatabase(Display *display);

       XrmDatabase XtScreenDatabase(Screen* screen);

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

       argv	 Specifies the command line parameters.

		 Specifies the application context.

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

		 Specifies the name of the application instance.

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

		 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 pa-
		 rameter to XrmParseCommand.  For further information, see
		 Xlib -	C Language X Interface.

       screen	 Specifies the screen whose resource database is to be re-

       The XtDisplayInitialize function	builds the resource database, calls
       the Xlib	XrmParseCommand	function to parse the command line, and	per-
       forms other per display initialization.	After XrmParseCommand 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 ar-
       gument.	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	usually	the
       final component of argv[0].  If the synchronize resource	is True	for
       the specified application, XtDisplayInitialize calls the	Xlib XSynchro-
       nize function to	put Xlib into synchronous mode for this	display	con-
       nection.	 If the	reverseVideo resource is True, the Intrinsics exchange
       XtDefaultForeground and XtDefaultBackground for widgets created on this
       display.	 (See Section 9.6.1).

       The XtOpenDisplay function calls	XOpenDisplay the specified display
       name.  If display_string	is NULL, XtOpenDisplay 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 XtDisplayInitialize 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 ap-
       plication name passed to	XtOpenDisplay.	If the application name	is
       NULL, it	uses the last component	of argv[0].  XtOpenDisplay returns the
       newly opened display or NULL if it failed.

       XtOpenDisplay is	provided as a convenience to the application program-

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

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

       The XtScreenDatabase function returns the fully merged resource data-
       base associated with the	specified screen.  If the screen does not be-
       long to a Display initialized by	XtDisplayInitialize, the results are

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

X Version 11			  libXt	1.2.0		XtDisplayInitialize(3)


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