Usage: where_used [options] model_name
 
	where_used searches the headers of all Pro/ENGINEER *.asm, *.drw and
	*.prt files recursive from your current directory for the given
	model_name.
 
	options:	-h =>	this help screen 
			-c =>	search current directory only (non-recursive)
			-a =>	search assembly's
			-p =>	search parts
			-d =>	search drawings
			-f =>	search all files

	If none of the three options -apd is given the search will be done in 
	all Pro/E models.
	
Author: Olaf Corten, the Netherlands
E-Mail: olafc@molding.fico.nl or ocorten@knoware.nl

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# History:
# 19990219 Changed SCRIPTS_DIR extraction.
# 19980701 Fixed -c option: *.asm.* - Ambiguous
# 19960723 Changed SCRIPTS_DIR setting.
# 19960625 minor bug (forgot to strip down modelnames for -c option).
# 19960605 multiple modelnames on the commandline
# 19960514 modelnames (with extensions) are stripped down.
# 19951011 SCRIPTS_DIR var.
# 19950519 -apd options.
# 19950401 Added options and help screen
# 1994	   first version
#
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