> Well, I was under the impression that windows decided how to handle a
> program based on the extension; i.e., if you call a .jpg a .blah, even
> though it has photoshop installed on the machine, it will choke and say it
> doesn't know how to open a .blah file.

Yes... Winders will use the extension to determine what app gets to open
the file. It always amuses me how different applications will compete to
become the default app and the warnings that tell you that bad things will
happen if you change from the (usually) MS defaults.

> Maybe if you renamed the .jpg to .tif though, you could get the photoshop
> program to open and then it would take over and decide to display the
> image correctly?

Depends somewhat on the application. Some of them will inspect the header
of the file to make sure that it's correct. Others will blindly attempt to
load the data file.

> In my short research on google, I read that a pif was similar to a bat
> file; can a bat file contain compiled code also?

True PIF files contain information on how to run a program. It was mostly
used in early versions of Windows for running DOS mode programs.

A bat file can contain compiled code, but not in the usual sense. You can
encode a binary file into a .bat and then use the bat to write a binary
and then execute it. This is actually pretty common on Linux, but is
possible on Windows.

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