execute dll with parameters

[dempsey]

Hello my Friends,

ive got a question about handling with dlls. ive a special dll from a customer which contains a algorithm and i want to test this algorithm with user specific values and collect the results. I am a hardcore beginner in c++ and sorry for that.

 string dllAbsolutePath = "C:\\temp\\costum_algorithm.dll";
    
    LPCSTR result = dllAbsolutePath.c_str();
    FARPROC pFunc;
    ifstream file;

    file.open(dllAbsolutePath.c_str());

    if(file.is_open() == false)
    {
	cout << "*.dll initiliazed failed" << endl << endl;
    }
    else
    {
	cout << endl << endl;

	// dll loaded successfully
	HMODULE hMod = LoadLibrary(dllAbsolutePath.c_str());
	pFunc = GetProcAddress(hMod, "Algorithm_Function");

	cout << pFunc << endl;

Right now i get only the Address of the Function but i want that this Function calculate some Values for me.

I hope that you can support me

Thank you

[AbstractionAnon]

You need to know the signature of the function you want to test in order to call it correctly.

Create a function pointer with the correct signature, assign pFunc to that function pointer. Then call the function via the new function pointer.

Example:

 
  int (*somefunc) (int arg1, int arg);
  int rslt;

  somefunc = (int (*)(int,int)) pFunc;  // cast function pointer
  rslt = (*somefunc) (1,2);

Note the cast from the void pointer to the signature of the function.
edit:
Corrected cast.