Dear Sir

how can i determine the 2nd occurrence for a string,

for example:

if i have the following string

D:\usama backup\Yanbu Project\HMI\Work done\usama.xls

and i need to detect the 2nd "\" or the third "\" or the last "\"

i can use find but find will allow me to determine the first "\" or
the "\" after a certain start number, but in case that i need the last
occurrence of the "\" i will not be able to use find

can you please help me on that