XtAppSetFallbackResources - set fallback resources
#include <X11/Intrinsic.h>
void XtAppSetFallbackResources(XtAppContext app_context,
    String* specification_list);
  - app_context
- Specifies the application context.
- specification_list
- Specifies a NULL-terminated list of resource specifications to pre-load
      the database, or NULL.
Each entry in specification_list points to a string in the format
  XrmPutLineResource. following a call to
  XtAppSetFallbackResources, when a resource database is being created
  for a particular screen and the Intrinsics are not able to find or read an
  application-specific class resource file and if specification_list is
  not NULL the resource specification in specification_list will be
  merged into the screen resource database in place of the application-specific
  class resource file. XtAppSetFallbackResources is not required to copy
  specification_list; the caller must ensure that the contents of the
  list and the strings addressed by the list remain valid until all displays are
  initialized or until XtAppSetFallbackResources is called again. The
  value NULL for specification_list removes any previous fallback
  resource specification for the application context. The intended use for
  fallback resources is to provide a minimal number of resources that will make
  the application usable (or at least terminate with helpful diagnostic
  messages) when some problem exists in finding and loading the application
  defaults file.
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface