This might help, its in the code archives as well:
http://www.blitzbasic.com/codearcs/codearcs.php?code=2238
http://www.blitzbasic.com/codearcs/codearcs.php?code=2238
The forum is locked. These are the original blitzbasic.com forums, kept so they can still be read. No new topics, replies or edits can be made here. To join in, head over to the Blitz3D+ forums.