P/Invoking function via a mangled name

Question

I\'m trying to call an function in an unmanaged c++ dll in .net cf 3.5 in a windows ce 6.0 environment.

The struct is defined as:

typedef struct TagO         


        

Answer 1

You can only call functions that have been exported as C style functions. As far as I am aware you cannot call straight C++ functions via P/Invoke, e.g.:

How to set up a C++ function so that it can be used by p/invoke?

Update

Actually, it does appear you can use mangled names when calling a function via P/Invoke. This is something I could never get working in the past, so I stand corrected. Using names rather than ordinals should be more resilient too:

Reference: Entry Point Not Found Exception

So something like:

[DllImport(gsmaAdapterDLLName,
    EntryPoint="?GetCurOperatorInfo@CGSMAdapter@@YAHPAUTagOperatorInfo@@@Z", 
    ExactSpelling = true,
    CallingConvention = CallingConvention.Cdecl)]
public static extern bool GetCurOperatorInfo(out TagOperatorInfo info);

And for .Net CF:

DllImport(gsmaAdapterDLLName,
    EntryPoint="?GetCurOperatorInfo@CGSMAdapter@@YAHPAUTagOperatorInfo@@@Z", 
    CallingConvention = CallingConvention.WinApi)]
public static extern bool GetCurOperatorInfo(out TagOperatorInfo info);