StrIndexOf() exists but StrLastIndexOf()?

Hi, I noticed that StrIndexOf() exists, it's very usefull but StrLastIndexOf() will can be as useful as StrIndexOf()... By Example, if we want search the last \ in a file path we can find where the file is located...
StrLastIndexOf search from right to left...
We can do this with StrIndexOf but only with a Boucle...
It's a small idea but a idea...
Thanks for your comments...

Look in my http://www.b4x.com/forum/additional-libraries/2022-stringsex-library.html#post10957 for that and more.

Thanks but it will be nice if it's directly implented in Basic4PPC without use an other Lib...