--- m.fl.orig	2004-08-13 16:38:24.000000000 -0700
+++ m.fl	2014-01-01 10:25:10.000000000 -0800
@@ -188,7 +188,7 @@
         }
         menuitem {} {
           label Numbers
-          callback {char* nrs = "0123456789";
+          callback {const char* nrs = "0123456789";
 if (o->mvalue()->value())
   Lesson->enable(nrs);
 else
@@ -199,7 +199,7 @@
         }
         menuitem {} {
           label Symbols
-          callback {char* syms = "./=?";
+          callback {const char* syms = "./=?";
 if (o->mvalue()->value())
   Lesson->enable(syms);
 else
@@ -231,7 +231,7 @@
       }
     }
   }
-  code {w->show(argc, argv);
+  code {Morse->show(argc, argv);
 while (1) {
   int c = Lesson->select();	// Select random letter
   bool pass = Teacher->teach(c);// Teach/test student