Excel vba Range script

In VBA, the two argument form of Range returns the smallest continous range that contatins both elements
Range(Range"D4:K5", Range(“C12”)) = Range(“C4:K12”)
I can’t find the equiviant in Excel’s scripting library or the AppleScriptReference from the MicroSoft website.
I had to come up with the method RangeBoundedBy (error handling TBD). I hope that there’s a better way.
Thanks in advance.

tell application "Microsoft Excel"
	set firstRange to range "D4:K5"
	set secondRange to range "C12"
end tell
RangeBoundedBy(firstRange, secondRange)
-- range "[Workbook1]Sheet1!$C$4:$K$12" of application "Microsoft Excel"


on RangeBoundedBy(aRange, bRange)
	tell application "Microsoft Excel"
		set aFirstRow to first row index of aRange
		set bfirstrow to first row index of bRange
		set aFirstCol to first column index of aRange
		set bFirstCol to first column index of bRange
	end tell
	set firstRow to Min(aFirstRow, bfirstrow)
	set firstCol to Min(aFirstCol, bFirstCol)
	set lastRow to Max(bottomRow(aRange), bottomRow(bRange))
	set lastCol to Max(rightCol(aRange), rightCol(bRange))
	
	tell application "Microsoft Excel"
		return get resize (row firstRow of column firstCol) row size (lastRow - firstRow + 1) column size (lastCol - firstCol + 1)
	end tell
end RangeBoundedBy


on rightCol(aRange)
	tell application "Microsoft Excel"
		return (first column index of aRange) + (count of columns in aRange) - 1
	end tell
end rightCol

on bottomRow(aRange)
	tell application "Microsoft Excel"
		return (first row index of aRange) + (count of rows in aRange) - 1
	end tell
end bottomRow

on Max(a, b)
	if a < b then
		return b
	else
		return a
	end if
end Max

on Min(a, b)
	if a > b then
		return b
	else
		return a
	end if
end Min