GetProcAddress returns null value

Question

I have this method exported from within a c++ project

#define EXTERN extern "C"
#define DLL_EXPORT __declspec(dllexport)


EXTERN DLL_EXPORT unsigned int BattleManager::ProcessBattleInEntityProcess()   {
    ....
}

Using dumpbin i get the following mangled name for that method

?ProcessBattleInEntityProcess@BattleManager@Skill@Entity@@QAEHXZ

However, when i import the method in a .NET 4.5 project i get error 127

 nativeCallbackName = "?ProcessBattleInEntityProcess@BattleManager@Skill@Entity@@QAEHXZ";
 IntPtr _procAddress = NativeAPI.GetProcAddress(_nativeCallbackDLL, nativeCallbackName);
if (_procAddress == IntPtr.Zero)
{
     Console.WriteLine("NULL ADDRESS for {0}", nativeCallbackName);
     Console.WriteLine(Marshal.GetLastWin32Error());
     return;
 }

This is just some extracted code, other methods work just fine.

Do yourself a favor and export *undecorated* functions from DLLs (without name mangling). — Cody Gray - on strike, Jul 08 '16 at 14:48
The issue is your name -- it is either wrong or is not exported.. `GetProcAddress` is not lying and does not have bugs. — PaulMcKenzie, Jul 08 '16 at 14:50
I know it's not lying, it's just that i copied the mangled name from dumpbin output — your_average_programmer, Jul 08 '16 at 14:53
The [DllImport] declaration for GetProcAddress() might well be lying, it is an unusual function. Anyhoo, you cannot call this function anyway since it is an instance method of a C++ class. You don't have a good value for the *this* argument you must pass. Use a C++/CLI project instead so you consume this C++ class directly. — Hans Passant, Jul 08 '16 at 14:54
That's part of a project that uses EasyHook, i know i can't call that method — your_average_programmer, Jul 08 '16 at 14:57

GetProcAddress returns null value

0 Answers0