DLL问题：为什么我无法读取外部变量？

Question

我在C中创建了一个Ts3插件，它应该读取2个值，并且我想使用c ++对其进行外部访问

plugin.c：

int isMuted_INPUT = -1, isMuted_OUTPUT = -1;
void ts3plugin_onUpdateClientEvent(uint64 serverconnectionhandlerID, anyID clientID, anyID invokerID, const char* invokerName, const char* invokerUniqueIdentifier) {


    if (ts3Functions.getClientSelfVariableAsInt(serverconnectionhandlerID, CLIENT_INPUT_MUTED, &isMuted_INPUT) == ERROR_ok) {
        printf("[MuteStatusHelper] Mute STATUS INPUT: %i\n", isMuted_INPUT);
    }
    if (ts3Functions.getClientSelfVariableAsInt(serverconnectionhandlerID, CLIENT_OUTPUT_MUTED, &isMuted_OUTPUT) == ERROR_ok) {
        printf("[MuteStatusHelper] Mute STATUS OUTPUT: %i\n", isMuted_OUTPUT);
    }

}

int  getMuteStatus_INPUT() {
    return isMuted_INPUT;
 }
int getMuteStatus_OUTPUT() {
   return isMuted_OUTPUT;
 } 

plugin.h：

__declspec(dllexport) int __cdecl getMuteStatus_INPUT(void);
__declspec(dllexport) int __cdecl getMuteStatus_OUTPUT(void);

它应该返回0或1，但返回-1 出于测试目的将其更改为

int  getMuteStatus_INPUT() {
    return 345;
 }

返回345

main.cpp

typedef HRESULT(CALLBACK* LPFNDLLFUNC1)();

int main()
{

    HINSTANCE hGetProcIDDLL = LoadLibrary(L"C:\\Program Files (x86)\\TeamSpeak 3 Client\\plugins\\MuteStatusHelper.dll");
    FARPROC lpfnGetProcessID = GetProcAddress(HMODULE(hGetProcIDDLL), "getMuteStatus_INPUT");
    typedef int(__cdecl * pICFUNC)();
    pICFUNC MyFunction;
    MyFunction = pICFUNC(lpfnGetProcessID);
    int Result = MyFunction();
    std::cout << "INPUT WERT: " << Result << std::endl;
    //FreeLibrary(hGetProcIDDLL);

}