use Win32::OLE

my $myCo = Win32::OLE->new('FOO.myCoClass') or die "Cannot create object"; # Works without problems

my $myCoInt =  Win32::OLE->new('FOO.ImyWantedinteface') or die "Cannot create object"; # Gives invalid class string
 
# Also given method doit is in the ImyWantedinterface's declaration
$myCo->doit(); # Fails