topic Re: Loading DLL from AddOn fails for ArchiCAD27 in Archicad C++ API

Loading DLL from AddOn fails for ArchiCAD27

Martin Walter — Tue, 17 Sep 2024 10:45:28 GMT

I have working code for an ArchiCAD-Addon for Versions 22-26. Now I try to run it with ArchiCAD 27 but it fails in the following line:

m_hModule = ::LoadLibrary(wstrDLLPath);

LoadLibrary() returns 0.

I investigated, that ::GetLastError(); returns 127, that means a Procedure is not found.

This does not make much sense in the ::LoadLibrary function.

Maybe it is the

BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved);

function that is missing in my DLL. Or did I miss something else?

Re: Loading DLL from AddOn fails for ArchiCAD27

Akos Somorjai — Sun, 03 Dec 2023 20:07:08 GMT

Hi Martin,

Couple of questions:
Is this your own DLL?
Is it on a path accessible by Archicad?
Can you load it if you place the DLL beside Archicad 27?

Best, Akos

Re: Loading DLL from AddOn fails for ArchiCAD27

Martin Walter — Mon, 04 Dec 2023 08:31:03 GMT

I found my mistake: It is my own DLL and it includes some ArchiCAD API functions. I compiled and linked it against the ArchiCAD 26 API and tried to load the DLL with ArchiCAD 27.