[REBOL] How to insert in the file

[Tiana . Zhang]

How can I insert a line into a file? I did the following:

FileStream: read/lines %temp.dat

foreach line FileStream [

.....

]


after I found the line, I need to insert another line in the file in front of
the line I just found. How can I do it?

I used insert %temp.dat "blablabla" but it didn't work.

Thanks very much for any suggestion.

Tiana