“Unable to find an entry point named [function] in dll” (c++ to c# type conversion)

Question

I have a dll which comes from a third party, which was written in C++. Here is some information that comes from the dll documentation:

//start documentation
         


        

Answer 1

Solved - at least to the point where the program does not break and actually returns me a bool value.

The key, I guess, was to specify the entry point as the 'mangled' name

    [DllImport(@"cnOCRsdk.dll", EntryPoint="?recoCHN_P_Name@CcnOCRsdk@@QAE_NPADPAURECO_DATA@@@Z")]
    public static extern bool recoCHN_P_Name(ref string imgPath, ref RECO_DATA o_data);

After that I got some other errors but the 'unable to find entry point' went away.