The index of characters starts at 0 rather than 1. The search starts at a specified character position and proceeds backward toward the beginning of the string for a specified number of character positions. Returns the position of the last occurrence of the specified character or string.
LastIndexOf(Text, Number, Number)
The index of characters starts at 0 rather than 1. The search starts at a specified character position and proceeds backward toward the beginning of the string for a specified number of character positions. Returns the position of the last occurrence of the specified character or string.