Thanks to the help from BrowserUK, I've already figured out that I have to write wrapper functions.

I've tried it the way you did above:

int wrap_RegisterClient2(int cl_id, char* read_ip) {
  return RegisterClient2(cl_id, read_ip);
}

[download]

but it doesn't work, I get the same error message as in the case without the wrapper.

It works with BrowserUK's method. In fact, I have to go one step further:

int wRegisterClient2( SV *id, SV *IP ) {
    int c_id = SvIV( id );
    char *c_ip = SvPVX( IP );
    int result = RegisterClient2( &c_id, c_ip );
    printf("%d", c_id);
    sv_setiv(id, (IV) c_id);
    return result;
}

[download]

Basically, the purpose of this RegisterClient2 function is to establish contact with the instrument that listens on the given IP address, and it gives back a unique numeric id in nClientId that I have to use in further calls. And if I want to access this id from Perl, I have to write back the integer value into the SV that was passed to the wrapper.

So what follows now is me rolling up my sleeves and go elbow-deep into perlguts.

Thanks to the advice anyway.

In reply to Re^2: Calling a function form an external DLL with Inline::C on windows by Anonymous Monk
in thread Calling a function form an external DLL with Inline::C on windows by Anonymous Monk

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