XtCreateApplicationShell - create top-level widget instance
#include <X11/Intrinsic.h>
Widget XtCreateApplicationShell(const char *name,
    WidgetClass widget_class, ArgList args, Cardinal
    num_args);
  - name
- Specifies the name of the shell.
- args
- Specifies the argument list to override any other resource
    specifications.
- num_args
- Specifies the number of arguments in the argument list.
The procedure XtCreateApplicationShell calls XtAppCreateShell with
  the application NULL, the application class passed to
  XtInitialize, and the default application context created by
  XtInitialize. This routine has been replaced by
  XtAppCreateShell.
XtAppCreateShell(3)
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface