/*** ROBOT.H ***/

typedef struct _rob
{
  ...data...
} ROBOT, *PROBOT;

/*** MAIN.C ***/
PROBOT robot[64]; // Global

guiarglist.grid  = &grid;
guiarglist.robot = robot;



/*** GUI.H ***/
struct guiarglst
{
	PGRID grid;
	PROBOT *robot; /* <<< */
};

void gui_drawgrid(struct guiarglst *guiarglist); // Prototype

/*** GUI.C ***/
void gui_drawgrid(struct guiarglst *guiarglist)
{
  robotno=1;  /* <<< */
  static char firstrun=1;
	static int  loops=0;
	static int  oldnetwork=0;
	PGRID grid;
	PROBOT *robot;

  if(firstrun)
	{
		grid  = guiarglist->grid;
		robot = guiarglist->robot;
...
..
.