Get Function Address

[ricky_cpp]

Hello All,

I have imported a .dll into my C# project. One of the function in dll is:

extern "C" __declspec(dllexport) void SetCallbackProcAddr(long lProcAddress)
{
g_CallbackProc = (decodePacket)lProcAddress;
}

which takes address of function from client project.

In my client project, I am having :

namespace Client
{

Class useDLL
{
[DllImport("exampleDLL.dll", EntryPoint = "SetCallbackProcAddr", ExactSpelling = false, CharSet = CharSet.Unicode, SetLastError = true)]
public static extern unsafe void SetCallbackProcAddr(long* apPointer);

//And I would like to pass below's function address to above function

public void CallBack(IntPtr apData, int aDataSize)
{

}

//Function test is called from main
public void test()
{
Client.SetCallbackProcAddr(????????); //What should replace ?????????
}
//Has someone any idea how should I pass on address of CallBack function )

}
}

I am new to C# and want first to import my projects in form of dll. example.dll is one of the projects which is using c++ and c files.

Can someone be of help?

Thanks and regards,
Ricky

[MadHatter]

try using a delegate.

[toraj58]

yes delegate is like c++ function pointer

[ricky_cpp]

Thanks Toraj and MadHatter. It is working now.

Am using delegate now and to get memory address I had to use

[UnmanagedFunctionPointer(CallingConvention.Cdecl)]
public unsafe delegate void callbackDelegate(in param)


regards,
Ricky

[cjard]

Ricky, please use CODE tags in future, when you post code