DLL problems. Help!

[ohmycee]

Hi. I'm trying to create a very simple dll with Pelles C using the wizard. I start by going to File > New > Project > Empty projects > Win32 Dynamic library (DLL). I then create a file named "main.c", and here's my sourcecode:

Code: [Select]

#include <stdio.h>

int hello(int var)
{
return 5 * var;
}

I want to access my dll from python as such:

Code: [Select]

from ctypes import *
test = cdll.LoadLibrary("helloDLL.dll")
print(test.hello(5))
The return result should be 25.

When I compile the code using gcc as follows, the DLL works:

Code: [Select]

gcc -c main.c
gcc -shared -o helloDLL.dll main.o

However, when I build with Pelles C, the function cannot be found.

What am I doing wrong? I'm just about to pull out my hair. Please help. Thanks.

[CommonTater]

http://msdn.microsoft.com/en-us/library/ms682589(v=VS.85).aspx

Also use the Windows DLL Wizard to create a project and look at the way it works.

[ohmycee]

Thanks CommonTater,

I'll keep plodding along to see what happens.

[CommonTater]

Pay particular attention to the DLLMain() function... it is called by LoadLibrary() which will fail if it's not there.

[TimoVJL]

depending calling convention:

Code: [Select]

int __declspec( dllexport ) __cdecl hello(int var)
{
return 5 * var;
}
or

Code: [Select]

int __declspec( dllexport ) __stdcall hello(int var)
{
return 5 * var;
}


[ohmycee]

OMG, thanks timovjl!

That bit of code really helped.

I so hate being a noob :-/