Sorry, this stuff appears to be beyond my skill

From the manual:
Code:

---

STRING sTest;
...
fhandle = file_open_read("test.txt"); // test.txt contains "this,is,a,test"
file_str_read(fhandle,sTest); // sTest now contains "this"
file_close(fhandle); 

---

But that doesn't explain to me how I get sTest to contain "test" or "is"? If "test.txt" actually contained 100 strings, how can I more or less randomly assign one of those strings to sTest?

If I can get an answer to this I think I can go ahead and begin my new project, so any help in sorting this would be immensely appreciated.

You can use this:
Code:

---

v_data = 0;// randomly this variable in a fonction and call read_help
v_loop_help =0;
var filehelp;

function read_help ()
{
	filehelp = file_open_read (filehelp_str);// open file
	while (v_loop_help < v_data)
	{
		file_str_read (filehelp, help1_str);
		v_loop_help = v_loop_help + 1;
	}
	file_close (filehelp);
	v_loop_help =0;
	v_data = 0;
	return;
}

---

in the text file I wrote words or sentence the one underneath other one
first line: I like 3DGS
seconde line: oups!
third line: 3DGS rules
if v_data =1 help1_str= I like 3DGS
if v_data =2 help1_str= oups!
if v_data =3 help1_str= 3DGS rules
etc....