VBA o VB6 busque o reemplace la cadena desde el final
rlpStr = StrReverse(Replace(StrReverse(str), StrReverse("Find"), StrReverse("Replace"), , 1))
Tense Trout
rlpStr = StrReverse(Replace(StrReverse(str), StrReverse("Find"), StrReverse("Replace"), , 1))