perl_rookie
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Nov 28, 2010, 8:37 AM
Post #1 of 1
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import c++ dll: problems with pointer
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Hello,
maybe somebody can help me with the following problem:
Iīve got a c++ dll with the api function int recvData(char* p_buffer, int size), which fills a buffer with chars.
(the api function has already worked, if you call from a c++ project)
Now I want to import the dll in perl. Therfore I wrote the following perl code:
#dll_test.pl################################################
use Win32::API;
my $recv = new Win32::API('mydll', '_recvData@8','PI','I'); #this is not a link, could not formate it
if(not defined $recv)
{
die "Canīt import API recvData: $!\n";
}
else
{
my $size = 8;
my $buffer = "\x00" x $size;
my $p_buffer = unpack('L', pack('P', $buffer));
$recv->Call($p_buffer, $size);
}
############################################################
The Win32::API call works, the function $recv executes, but $buffer is still empty.
Does someone know whatīs wrong?
thanking you in anticipation
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