Writing encrypted files
Posted by BuzzBeeSi on May 20, 2001
i have spent hours fiddling about with code and i can't figure out how to write files. i just looked at a couple of other posts and they worked! however, i would like to know how to write a file in .dat format or something, where u can't make any sense at all out of it
Re: webmaster Guido on May 22, 2001
What in fact are you looking for? A way to encrypt a .TXT file? Or do you want to
encrypt any type of file, textfiles as well as all other types?
I ask this, because in Delphi there is quite a difference between dealing with "text" files
and dealing with all other types of files (non-text files, also called "binary" files).
.DAT is not a format, it's just a file extension that is often used by programmers
to store data in their own format. I mean, it's not like .XLS (MS Excel text) or .DOC
Word) or .BMP (BitMaP file), which are formats defined by MicroSoft.
For a file with an extension that is not "registered" with the user's Windows system,
Windows does not know what applicaion to start when the user double-clicks the file.
What extensions are registered, can be very different on 2 PC's. For example, I can
register the extension .DAT and tell Windows to open all .DAT files with NotePad.
The other way around, you always can launch an application like NotePad or MS-Word
and try to "open" any type of file (you also can tell Windows to "open with" after
double-clicking a file in Explorer). Opening a .BMP file with NotePad usually doesn't
give you any readable
text, unless of course you have *written* text in the file! For example, if you have
saved a text as MYTEXT.TXT with NotePad and next renamed it to MYPICTURE.BMP.
That's all very general, I know, but maybe it helps you in rewriting your question in
more specific words ;)
Please, don't hesitate to ask again!