Converting 'year of' to Obj-C

I have converted (almost) of the following to work in XCode – except the last line pertaining to “year of”

tell application "Microsoft Excel"
	set theRange to get range "Date" of active sheet
	tell theRange to set theValue to value of cell 1 of row 1
	set aYear to year of theValue
end tell

Thanks for bailing me out.

You might try taking that line outside of the “Excel” tell block.