proc appendSelCV t {

	global curCell CellValues CellFormulae curVal

	set il [$t curselection]
	set first [alphaIndex [lindex $il 0]]
	set last [alphaIndex [lindex $il end]]
	if {$first == $last} {
	append curVal "\$$first"
	} else {
	append curVal "\$$first.$last"
	}
}
