Delphi : Working with path, file name, directory

From time to time, you would need file manipulations integrated with your software(s), and you usually needs the library for working with your directory, these are couples of directory routines which is very much usefull

1. ExtractFilePath : this will returns the directory for a file, including a backslash("\" ~ Env. Windows) 
2. ExpandFileName: Example : "c:\program files\yohan\is\cool\..\.." will returns "c:\program files\yohan\"

Two very handy functions! :)