...
my $uname   = 'USER1';
my $passw   = 'PASS';
my $domain  = 'DOMAIN';
## use constant NICE_OPT_NAME => 128; etc. if you want symblic names
my $options = 128 | 16 | 2; 
my $client;

OMDClinetCreate( $uname, $passw, $domain, $options, $client )
    or die $^E; ## Add this to your other calls also!.