Simple Hex edit

I am wondering if there a simple way to change 1 character of a file. Is there a simple program with command prompt that can be executed. I don't really want to open, load, and resave as it is a 30mb file.

Thanks.

As you wish to replace part of a file for something the same size the whole file does not have to be loaded.

If you know the position of this byte/char it's even easier. Any old Hex editor should do or a little bit of code...

Code:

---

Dim FF as Integer, BytPos as Long, NewChar as byte
FF = freefile
BytPos = 123456 'or whatever
NewChar = Asc("x") 'or whatever
    If Lenb(filename) <> 0 Then
        'On error resume next 'comment out for debugging
        Open filename for binary as #FF
        If LOF(ff) >= BytPos then Put #ff,BytPos,NewChar
        Close #ff
        'On error goto 0
    end if

---

I'm without IDE so the above might want tweaking :)