//TESTAPP.CPP (Load dll)
#include <windows.h>
#include <stdio.h>

#define DLL_NAME "TestDll.dll"
#define DLL_FUNC "AddFunc"
typedef int (*DllFuncPtr)(int x, int y);

int main()
{
    printf("TestApp [Dynamic Dll Loading]\n");
    printf("Loading dll: "DLL_NAME"\n");
    HMODULE dll = LoadLibraryA(DLL_NAME);
    if (dll != NULL) { printf("Dll loaded!\n"); }
    else { printf("Dll failed to load!\n"); return 1; }
    printf("Getting function: "DLL_FUNC"\n");
    DllFuncPtr dllFunction = (DllFuncPtr)GetProcAddress(dll, DLL_FUNC);
    if (dllFunction != NULL) { printf("Function found!\n"); }
    else { printf("Function not found!\n"); return 1; }
    int testx = 10, testy = 15;
    int ret = dllFunction(testx, testy);
    printf("Values given: %d, %d\n", testx, testy);
    printf("Value returned: %d\n", ret);
    FreeLibrary(dll);
    return 0;
}

//TESTDLL.cpp (dll)
__declspec(dllexport) int AddFunc(int x, int y)
{
    return x + y;
}