Win32::API::Type->typedef( 'FT_HANDLE', 'PVOID' );
    Win32::API::Type->typedef( 'FT_STATUS', 'ULONG' );
    #import function
    my $fct_open = new Win32::API( 'FTD2XX', 'FT_Open', 'IP', 'I');
    unless( $fct_open ){
        print("FT_Open not found!\n");
        return 0;
    }
    #call imported function
    my $handle = " ", x 64;
    my $status = $fct_open->Call( $devNum, $handle );