(my $copy = $ARGV[0]) =~ s/([^[:print:]])/sprintf " (0x%02x) ", ord $1
+/ge;
print $copy;
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The above piece of code can help you figure out windows' interpretation of what you keyed. It prints all the non-printable chars as hex.

For example, if you punch "Ctrl-^" "w", which appears on your screen as "^^w" (I guess that's how you get it), this program tells you window takes that "Ctrl-^" as 0x1e.

Update:

At one point, I had the same thought as BrowserUK, that ^ is an escape char, but after I tested on my PC, it does not behave like that... so not all versions. (well I am still running win98)