| XtOpenApplication(3) | Library Functions Manual | XtOpenApplication(3) | 
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