application.convertFormula converts converts range addresses of formulas between the two reference styles A1/R1C1 and/or between relative and absolute addresses.
The parameters of the function are:
Formula
FromReferenceStyle
xlA1 or xlR1C1
ToReferenceStyle
xlA1 or xlR1C1
ToAbsolute
xlAbsolute, xlAbsRowRelColumn, xlRelative or xlRelRowAbsColumn