calling function in dll not working

A lib file would be easier, but in my case i really need a dll.
When i used dumpbin on my dll it gave me the following output:

dumpbin \EXPORTS path\to\file.dll
File Type: DLL

Summary

1000 .data
1000 .idata
2000 .rdata
1000 .reloc
1000 .rsrc
4000 .text
10000 .textbss

Got it fixed. I had to use declspec(export). This is how it looks right now:

Code:

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extern "C" __declspec(dllexport) int testfunc ( int x );

..
..

int testfunc (int x)
{
        MessageBoxW ( NULL, L"test", L"blaat", MB_OK );
        return x;
}

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Thanks alot guys for your help!

Quote:

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A lib file would be easier, but in my case i really need a dll.

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You know, when you build a dll with export, the lib file is created as well. The one is called DLL's import library. Just search around for simple dll samples. :)