document updated 10 years ago, on Jul 6, 2014

I'm not sure what's the best way to get format-name ⇒ formatID.

But this is one possible way:

# mapping from format-name to formatID
my %clipboard_formats = map { $cb->GetFormatName($_) => $_ } $cb->EnumFormats();

(Note: this only gets formats that are available in the current clipboard. So use this to check whether a format is available.)