Как возвратить переменную из dll?

#include<windows.h>
#define Export extern "C" __declspec(dllexport)
HHOOK _hook;
int code=0;
LRESULT CALLBACK KeyProc(int ncode,WPARAM wParam,LPARAM lParam){
    code=(int)wParam;
    MessageBox(NULL,"123","hook!",MB_ICONWARNING);
    return CallNextHookEx(_hook,ncode,wParam,lParam);
}
Export int num_key(){
    return code;
}

#include "StdAfx.h"
 
extern "C"
{
    __declspec(dllexport) UINT SomeOutsideVariable1 = 0;
    __declspec(dllexport) UINT SomeOutsideVariable2 = 1;
    __declspec(dllexport) UINT SomeOutsideVariable3 = 2;
 
    __declspec(dllexport) UINT GetSomeOutsideResult(void)
    {
        printf("    > Hello from "%s"!\n", __FUNCTION__);
 
        return rand() % 71;
    }
}
 
bool __stdcall DllMain(HMODULE _Module, ULONG _Reason, void* _Reserved)
{
    if (_Reason == DLL_PROCESS_ATTACH)
    {
        printf("    > Hello from "%s"!\n", __FUNCTION__);
 
        srand(time(0));
    }
 
    return true;
}

#include "StdAfx.h"
 
int main(void)
{
    puts("Loading ExportDLL...");
 
    HMODULE exportDll = LoadLibrary(L"ExportDLLTest.dll");
 
    if (exportDll)
    {
        UINT* SomeOutsideVariable1 = reinterpret_cast<UINT*>(GetProcAddress(exportDll, "SomeOutsideVariable1"));
        UINT* SomeOutsideVariable2 = reinterpret_cast<UINT*>(GetProcAddress(exportDll, "SomeOutsideVariable2"));
        UINT* SomeOutsideVariable3 = reinterpret_cast<UINT*>(GetProcAddress(exportDll, "SomeOutsideVariable3"));
 
        printf("Next variables exported: [%u] [%u] [%u]\n", *SomeOutsideVariable1, *SomeOutsideVariable2, *SomeOutsideVariable3);
 
        *SomeOutsideVariable1 = *SomeOutsideVariable2 + *SomeOutsideVariable3;
 
        printf("Result: [%u] [%u] [%u]\n", *SomeOutsideVariable1, *SomeOutsideVariable2, *SomeOutsideVariable3);
 
        void* GetSomeOutsideResult = GetProcAddress(exportDll, "GetSomeOutsideResult");
 
        printf("Next functions exported: [%08X=%u]\n", GetSomeOutsideResult, reinterpret_cast<int (__cdecl*)(void)>(GetSomeOutsideResult)());
    }
    else puts("No ExportDLL found.");
 
    getchar();
 
    return 0;
}

#include "StdAfx.h"
 
#pragma comment(lib, "ExportDLLTest.lib")
 
extern "C"
{
    __declspec(dllimport) UINT SomeOutsideVariable1;
    __declspec(dllimport) UINT SomeOutsideVariable2;
    __declspec(dllimport) UINT SomeOutsideVariable3;
 
    __declspec(dllimport) int GetSomeOutsideResult(void);
}
 
int main(void)
{
    printf("Starting...\nNext variables exported: [%u] [%u] [%u]\n", SomeOutsideVariable1, SomeOutsideVariable2, SomeOutsideVariable3);
 
    SomeOutsideVariable1 = SomeOutsideVariable2 + SomeOutsideVariable3;
 
    printf("Result: [%u] [%u] [%u]\n", SomeOutsideVariable1, SomeOutsideVariable2, SomeOutsideVariable3);
 
    printf("Next functions exported: [%08X=%u]\n", GetSomeOutsideResult, GetSomeOutsideResult());
 
    getchar();
 
    return 0;
}

UINT SomeOutsideVariable2 = 1;
 
extern "C"
{
 
    __declspec(dllexport) UINT GetSomeOutsideResult(void)
    {
        return SomeOutsideVariable2 ;
    }
}
 
bool __stdcall DllMain(HMODULE _Module, ULONG _Reason, void* _Reserved)
{
 
}