The reference to the integer is actually the reference to the first integer in an integer array, with the subsequent 3 array values also being used to store analogue results.

For functions that require blocks of memory, use a string of the appropriate size. 

my $read_inputs = Win32::API->new("wsp", "ReadInputs", "P", "I");

sub ReadInputs {
    my $buf = "\x00" x (4 * 32/8);
    my $rv = $read_inputs->Call($buf);
    return ($rv, unpack('l4', $buf));
}

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Update: Fixed name of function. Changed "->()" to "->Call()"

In reply to Re: Win32::API cant define function by ikegami
in thread Win32::API cant define function by BarneySimpson

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