Sindbad~EG File Manager

#define MAXBUTTONS 35

typedef struct
{  HWND hchild;
   HWND htoolbar;
   int xbutton; // the x size of the button bar
   int ybutton; // the y size of the button bar
   BOOL problem; // TRUE if problem has been defined
   HWND hdisplay; // handle to window for displaying singularities, etc.
   term **singularities;  // array of pointers to terms
   int nsing;   // dimension of that array
   term **jumps;  // array of pointers to terms
   int njumps;  // dimension of that array
   unsigned long *singcolors;  // colors to use in displaying the singularities
   unsigned long *jumpcolors;  // colors to use in displaying the jumps
   int hidetoolbar;  // nonzero means toolbar is hidden
   int hzooms;   //  accumulated signed count of horizontal zooms
   int vzooms;  //   vertical zooms
   HWND button_hwnd[MAXBUTTONS];  // handles of the toolbar buttons
} Grafproc_State;

dstate *get_screendevice(void);
dstate *get_printdevice(void);
LRESULT CALLBACK GraphWndProc(HWND hwnd, UINT message, UINT wParam, LONG lParam);
BOOL CALLBACK PointSlopeDlgProc(HWND,WORD,WORD,DWORD);
HCURSOR change_cursor(HWND hwnd, HCURSOR hNewCursor);
int GraphRanges(HWND hwnd, PDOCDATA pGraphData);
MEXPORT_GETPROB void display_commentary(unsigned long hwnd);
HWND CreatePointSlope(HWND hwnd, PGRAPHDATA pGraphData);
void set_graph_editswitch(int);
void graph_setmenu(HWND hwnd);
void deselect_aux(int wParam,HWND hGrfChild, PGRAPHDATA pGraphData, int whichgraph);
void set_pixel_fields(HWND hChild, PGRAPHDATA pGraphData);