Can someone send me a project where a DLL works in the PLUGINDIR, but does not work with dll_open? I'll look into this. At the moment I can not confirm a problem with dll_open.

I'll send you a sample project in a few days. I'm pretty much under time pressure currently, sorry.

Did you recieve my email concerning the Wiimote library?

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I haven't had time yet to put together a simple example showing the necessity of a WDL file, but it's on my list.

Yes. I'm late with answering emails, but I'll respond today or tomorrow.

I'm late as well, but I've finished a small demonstration for the dll_open() related problem.

Find the files here: http://www.firoball.de/upload/tracker_debug.zip

Start tracker.c
First it should show a dialog with some number (it's the DLL handle - the proof that you're right about dll_open finding the DLL). Then it should show the state of your Wiimote (not necessary to connect it for reproducing this problem - it only reports either "found" or "not found")

If you rename tracker.wdl to something different and try the same thing again, Acknex will crash.
I added a comment to the functions which are called from the DLL to give you some overview which is what.

Hope that helps to narrow down the problem.

Thanks for the example! Yes, there's indeed a bug - his DLL is not properly opened by dll_open. This will be fixed. We'll probably replace dll_open anyway by a pragma definition. Until then, don't use dll_open but keep the DLL in the plugindir.

but....

pragma_ ... does not allow us to load/reload DLLs at runtime

Sure you can load them at runtime, but with DefineApi() or LoadLibrary(), not with the pragma method. Look here:

http://manual.conitec.net/litec_api.htm

Oh this works for custom dlls as well? I thought it only was for Windows API stuff....

No, DefineApi() or LoadLibrary() work with all Win32 DLLs, including engine plugins.