Is there any methods or documents I can refer to learn how to write a file at any desire position with any length without to write the whole again ? I mean, I dont want to write to a new file, kill the old file, rename the new file, or read the old file, modify it and rewrite the old file etc...
for example, for a mp3 file, I can modify the tags by its header location. So I just want to overwrite some bytes to the head of the file, then the rest are just remain the same.... Any suggestion are very apperciate =) Thanks in advice
