use Win32::API; $function2 = Win32::API->new( 'mydll', 'sum_integers', 'II', 'I', ); $function3 = Win32::API->new( 'mydll', 'sum_integers', 'III', 'I', ); $function4 = Win32::API->new( 'mydll', 'sum_integers', 'IIII', 'I', ); $function5 = Win32::API->new( 'mydll', 'sum_integers', 'IIIII', 'I', ); $function6 = Win32::API->new( 'mydll', 'sum_integers', 'IIIIII', 'I', );