Anyone here programming in Delphi 4?



I just received Delphi 4 from a friend, and I was just trying to build my first application.
I have no help files included, so I must find out everything on my own
Can somebody tell me how to check if a file is present, and if yes, how to check if it contains a certain string (text, for example). And is it possible to provide a CD-sector number to Delphi 4, and check if the sector contains certain data (and if yes, do A and if not, do B)?