Returns a pointer to the last occurrence of a character in a string.
function StrRScan(Str: PChar; Chr: Char): PChar;
A pointer to the last occurance of Chr in Str nil if Chr does not occur in Str
StrRScan returns a pointer to the last occurrence of Chr in Str. If Chr does not occur in Str, StrRScan returns nil. The null terminator is considered to be part of the string.