Ok, I must be missing something then

Im looking at the download (just downloaded again, to make sure I have the newest),
In the help file under
Cryption, it has the following procedures:
DG_DeCryptFile
DG_DeCryptFileToMem(File.s, key.s)
DG_EnCryptFile(File.s, key.s, [ToFile.s])
DG_MemoryToStr(*source, ssize)
DG_StrToMemory(Text.s, *dest, ssize.l)
Am I looking in the wrong place? Say I have a memory block, and I want to encrypt that memory block, which one of the above do I use? Or I am probably missing something, tis late night right now.