XtAppAddBlockHook(3Xt)		XT FUNCTIONS	       XtAppAddBlockHook(3Xt)



NAME
  XtAppAddBlockHook, XtRemoveBlockHook - register a block hook procedure

SYNTAX
  XtBlockHookId XtAppAddBlockHook(app_context, proc, client_data)
	XtAppContext app_context;
	XtBlockHookProc proc;
	XtPointer client_data;

  void XtRemoveBlockHook(idFP)
	XtBlockHookId id;

ARGUMENTS

  app_context
	    Specifies the application context.

  proc	    Specifies the block hook procedure.

  num_args  Specifies the application-specific data to be passed to the block
	    hook.

DESCRIPTION
  XtAppAddBlockHook registers the specified procedure and returns an identif-
  ier for it.  The hook is called at any time in the future when the Intrin-
  sics are about to block pending some input.

  Block hook procedures are removed automatically and the XtBlockHookId is
  destroyed when the application context in which they were added is des-
  troyed.

  XtRemoveBlockHook removes the specified block hook procedure from the list
  in which it was registered.

SEE ALSO
  X Toolkit Intrinsics - C Language Interface
  Xlib - C Language X Interface