Strange hint: Inline function 'DeleteFile' has not been expanded??

Hi everybody,

I'm trying to delete a file in a Delphi console application. Everything
works fine and the project compiles, except for one hint which I do not
understand:

[Pascal Hint] project.dpr(102): H2443 Inline function 'DeleteFile' has not
been expanded because unit 'Windows' is not specified in USES list

If I try to add the Windows unit, I get all sorts of errors on other lines.

Can anybody explain to me what this means?

Thanks!

Ikke
.