Posted 30 August 2005 - 11:42 AM
The following reserved device names cannot be used as the name of a file:
CON, PRN, AUX, CLOCK$, NUL, COM1, COM2, COM3, COM4, COM5, COM6, COM7, COM8, COM9, LPT1, LPT2, LPT3, LPT4, LPT5, LPT6, LPT7, LPT8, and LPT9.
You must avoid using these names as a file name suffix or file name body, so you have to avoid names such as aux.c, file.aux or NUL.txt.