EntryPointNotFoundException - Что делать ?

Пытаюсь импортнуть из своей дллки функции, но высирается такая хуйня.
Код на C#:

[DllImport("GraphicalUserInterface.dll")]
public static extern void UpdateGameMode([MarshalAs(UnmanagedType.LPStr)] string new_gamemode);

[DllImport("GraphicalUserInterface.dll")]
public static extern bool ForceStartPressed();

[DllImport("GraphicalUserInterface.dll")]
public static extern bool TakeHostPressed();

[DllImport("GraphicalUserInterface.dll")]
public static extern bool AntiKickStatus();

[DllImport("GraphicalUserInterface.dll")]
public static extern bool BypassPasswordsStatus();

[DllImport("GraphicalUserInterface.dll")]
public static extern bool PlayerEspStatus();

[DllImport("GraphicalUserInterface.dll")]
public static extern bool KeyEspStatus();

CSHARP

[DllImport("GraphicalUserInterface.dll")]

public static extern void UpdateGameMode([MarshalAs(UnmanagedType.LPStr)] string new_gamemode);



[DllImport("GraphicalUserInterface.dll")]

public static extern bool ForceStartPressed();



[DllImport("GraphicalUserInterface.dll")]

public static extern bool TakeHostPressed();



[DllImport("GraphicalUserInterface.dll")]

public static extern bool AntiKickStatus();



[DllImport("GraphicalUserInterface.dll")]

public static extern bool BypassPasswordsStatus();



[DllImport("GraphicalUserInterface.dll")]

public static extern bool PlayerEspStatus();



[DllImport("GraphicalUserInterface.dll")]

public static extern bool KeyEspStatus();

Код на C++:

extern void UpdateGameMode(const char* new_gamemode)
{
game_mode = new_gamemode;
}

extern bool ForceStartPressed()
{
return force_start;
}

extern bool TakeHostPressed()
{
return take_host;
}

extern bool AntiKickStatus()
{
return anti_kick;
}

extern bool BypassPasswordsStatus()
{
return bypass_passwords;
}

extern bool PlayerEspStatus()
{
return player_esp;
}

extern bool KeyEspStatus()
{
return key_esp;
}

C

extern void UpdateGameMode(const char* new_gamemode)

{

    game_mode = new_gamemode;

}



extern bool ForceStartPressed()

{

    return force_start;

}



extern bool TakeHostPressed()

{

    return take_host;

}



extern bool AntiKickStatus()

{

    return anti_kick;

}



extern bool BypassPasswordsStatus()

{

    return bypass_passwords;

}



extern bool PlayerEspStatus()

{

    return player_esp;

}



extern bool KeyEspStatus()

{

    return key_esp;

}