Hello all,
sorry if I'm making a silly mistake here, but I'm not sure what the best way is.
I'm making a file that has several blocks (at predefined positions). When I create the file, the blocks are not full (i.e. not contiguous). They will be filled later. So, I'd like to skip/extend the file to the position of the next block. Using a seek() and a write just appends and doesn't work.

how do I extend file?
thanks
K
below is the code:

Qt Code: 
  1. //make a new file with name in the directory 
  2. 	file = new QFile(path +"\\"+ name);
  3. 	if(file->open(QIODevice::Append))
  4. 		fileName = name;// the file has been opened
  5. 	else
  6. 		return -1;
  7.  
  8. //	make a text stream
  9. 	QTextStream stream( file );
  10.  
  11. //	write the header
  12. 	stream.seek(POS_HEADER);
  13. 	stream << makeHeader();
  14.  
  15. //	write the comments block 
  16. 	QString comments("This is the standard comments block");
  17. 	stream.seek( POS_HEADER_COMMENT);
  18. 	stream << comments;
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