Sindbad~EG File Manager

#define BUTTON_PROBLEM   45641u
#define BUTTON_GRAPH     45642u
#define BUTTON_DEMO      45643u

typedef struct stup
  { int topic;
    char *filename;
    int flag;
  } startup;

/* The filename above is returned as the problem file to be opened;
the filename will be appended to the home directory of the
selected textbook, or if Problems=Textbook is not in mathpert.ini,
to the Mathpert directory (where mathpert.exe was installed).
(Hence normally the filename will have no path.)
   If there is a selected textbook, but the .toc file does not
list any file for the topic, then filename should be returned as NULL.
*/