in main :

video_set(800,600,32,1);  //fullscreen
mouse_mode = 0; // I don't want a pointer but I want the mouse to be active
mouse_pointer = 0;
...
level_load ....	

in action 
....
while (1)
{
	if (mouse_left) {_move_me = c_move (my, vector(15*time_step, 0, 0), nullvector, 
	IGNORE_MAPS | ACTIVATE_TRIGGER | IGNORE_CONTENT | USE_BOX | GLIDE  | IGNORE_PASSABLE);}

	if (mouse_right) {_move_me = c_move (my, vector(-15*time_step, 0, 0), nullvector, 
	IGNORE_MAPS | ACTIVATE_TRIGGER | IGNORE_CONTENT | USE_BOX | GLIDE  | IGNORE_PASSABLE);}

	my.pan -= 5 * mouse_force.x * time_step;
	
	vec_diff(vec_tempmi,my.pan,camera.pan); // defined as global vector
	c_rotate (my,vec_tempmi ,  IGNORE_PASSABLE | USE_AXISR  ); 
	vec_set (camera.pan, my.pan );// the camera and my have the same pan angle
	
	wait (1);
}

//Can you reproduce problem with this code
// In windows ...place cam menu in the middle of screen at the top
// Drive forward and turn as fast as possible and get the cam menu
///////////////////////////////
#include <acknex.h>
#include <default.c>

#define PRAGMA_PATH "..\\Models";

ENTITY* car;
VECTOR* vec_tempmi= {x=0;y=0;z=0;} 
short _bouge_o_n = 0; // used for evaluation in another function 

action my_car()
{
	car = my;
	wait (2);
	
	while (1)
	{	
		// move the car using relative_speed  
		//------------------------------------------------
		_bouge_o_n = c_move (my,vector(10 * (key_force.y) * time_step, 10 * (-key_force.x) * time_step, 0),
		nullvector, IGNORE_MAPS | ACTIVATE_TRIGGER | IGNORE_CONTENT | USE_BOX | GLIDE  | IGNORE_PASSABLE); //

		//------------------------------------------------
		// move the car with mouse left and right
		if (mouse_left) {_bouge_o_n = c_move (my, vector(15*time_step, 0, 0), nullvector, GLIDE);}
		if (mouse_right) {_bouge_o_n = c_move (my, vector(-15*time_step, 0, 0), nullvector, GLIDE);}
		//----------------------
		vec_set(camera.x,vector(my.x,my.y,my.z+30)); //place camera in first person mode 
		my.z = 8;// hold the car at same position on floor
		//----------------------
		// rotate the camera and the car around 
		my.pan -= 15 * mouse_force.x * time_step; 
		vec_diff(vec_tempmi,my.pan,camera.pan);
		c_rotate (my,vec_tempmi ,  IGNORE_PASSABLE | USE_AXISR  ); 

		vec_set (camera.pan, my.pan );// the camera and the car have the same pan angle
		
		wait (1);
	}
}

function main()
{	
	video_mode = 7; // start resolution 800 x 600
	video_screen = 1; // start in fullscreen mode 	
	video_depth = 32; // 32 bit mode
	// Starting with video_mode is now better
	// The pointer was visible more often when starting the game with the following line
	//	video_set(800,600,32,1);  
	wait(1);
	level_load ("homework18.wmb");
	wait (2);
	mouse_mode = 0;
	mouse_pointer = 0;

}

function display_coords ();

function my_mouse ()
{
	enable_mouse = 1; 
	mouse_mode = 1; 

	mouse_range= 1500; // only near Entities are clickable

	display_coords ();
	
	while (mouse_mode > 0) // move it over the screen
	{ 
		mouse_pos.x = mouse_cursor.x;   
		mouse_pos.y = mouse_cursor.y;
		wait(1);
	}
}

STRING* temporary_str = "";
STRING* coordinates_str = "";

///////////////////////////////////////////////////////////////////////////////////////////////

TEXT* mcoordinates_txt = // using the default FONT here
{ 
	STRING = coordinates_str;
	layer = 20;
	flags = SHOW;
}

///////////////////////////////////////////////////////////////////////////////////////////////

function display_coords ()
{
	while (1)
	{
		str_for_num(temporary_str, mouse_pos.x); // convert mouse_pos.x to a string
		str_cpy(coordinates_str, "("); // add the first paranthesis
		str_cat(coordinates_str, temporary_str); // add mouse_pos.x to the string
		str_cat(coordinates_str, ","); // add a comma to separate mouse_pos.x and mouse_pos.y
		str_for_num(temporary_str, mouse_pos.y); // convert mouse_pos.y to a string
		str_cat(coordinates_str, temporary_str); // add mouse_pos.y to the string
		str_cat(coordinates_str, ")"); // add the second paranthesis
		mcoordinates_txt.pos_x = mouse_pos.x + 15; // keep the text in the lower right corner
		mcoordinates_txt.pos_y = mouse_pos.y + 15; // in relation to the mouse position
		wait (1);
	}
}

function main()
{	

	video_mode = 7; // start resolution 800 x 600
	video_screen = 1; // start in fullscreen mode 	
	video_depth = 32; // otherwise 32 bit mode
	wait(1);
	level_load ("");
	wait (2);
	my_mouse ();

}