I called from C like this ...

With your Strawberry Perl, any compilation that is done (eg with Inline::C) will be done using gcc-7.1.0.
I don't see any issue with your code and gcc-7.1.0.
And, AFAIK, it doesn't matter whether the dll you want to load was built from C code or C# code or C++ code. Nor should it matter which compiler built it.

There is the problem that "result" is undeclared - which I "fixed" by commenting out "funci(&result)", as that else block will never be entered in my case, anyway.
The program then compiled and ran cleanly when built with gcc, outputting "DLL not found" (as expected).

If that program works fine for you, then it should be fine with Strawberry Perl and Inline::C ... unless, of course, DLLExportTest.dll wants to load a file (eg another dll) that is not locatable in the Srawberry Perl environment.

This Inline::C script runs fine for me on Strawberry Perl 5.26.0 and, after compilation, outputs "initdll returned: 0". 
use strict;
use warnings;

use Inline C => Config =>
  BUILD_NOISY => 1;

use Inline C => <<'EOC';

typedef int (__stdcall *f_funci)();

int initdll()
{
    double a = 1;
    double b = 2;
        HINSTANCE hInst =
         LoadLibrary("C:\\dev\\teste\\DLLExportTest.dll");
    if( hInst != NULL )
    {
          f_funci funci = (f_funci)GetProcAddress(hInst, "Add");
        if (!funci) {
            printf( "could not locate the function\n" );
            return EXIT_FAILURE;
        } else {
            /* funci(&result); */
        }
      
        FreeLibrary( hInst ); // temporary
        return 1;
    }
    else
    {
        return 0;
    }
    
}

EOC

print "initdll returned: ", initdll(), "\n";

[download]

Cheers,
Rob

In reply to Re^3: Import a DLL from C# to Perl by syphilis
in thread Import a DLL from C# to Perl by paulorfmmb

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