Hello all,
I would like to create a simple which runs directly on Control WinV3 x64 3.5.21.0

For this purpose I created a simple dll myAdder.dll in Cpp

// MyAdder.cpp
// cl /LD /EHsc MyAdder.cpp /Fe:MyAdder.dll
#include <windows.h>
extern "C" __declspec(dllexport) int __cdecl CmpMyAdder_Add(int a, int b)
{
    return a + b;
}

I added the dll in the respective folder. Furthermore I "registred" the dll in the CODESYSControl.cfg. However, when I want to use the library I get the error message: Uresolved reference: *'CMPMYADDERADD' *

Can you give me a hint what step I missed or where I need to declare the dll, such that the dll resp. the reference can be resolved.

Many thanks and kind regards

you need the check the plclog if the the component have been loaded on startup of th plc.

Hello,
many thanks for your reply. I checked the logs. It seems that dll is not loaded. However other dll such as the Webserver are loaded. Could you tell me what I need to do such that my dll is loaded.
(Furthermore I changed the C-Function a bit. I used the M4.exe from the SDK.)

Many thanks.