DllNotFound Exception when I use glut functions in my Dll

Question

I have a c++ dll and c# application. In C# application I call function from dll. With simple function like:

extern "C"
{
    __declspec(dllexport) void HelloFromDll()
    {
        MessageBox(NULL, _T("Hello from DLL"), _T("Hello from DLL"), NULL);
    }
}

all works fine. When i use function with glut like this:

extern "C"
{
    __declspec(dllexport) int InitGlut()
    {
        glutInitDisplayMode(GLUT_DEPTH | GLUT_DOUBLE | GLUT_RGBA);
        glutInitWindowPosition(100,100);
        glutInitWindowSize(320,320);
        glutCreateWindow("MyWindow");
        glutDisplayFunc(renderScene);
        glutMainLoop();
        return 0;
    }
}

i get DllNotFound Exception. Why? C# code:

const string pathToDll = "../../../Release/MyDLL.dll";
[DllImport(pathToDll)]
public static extern void HelloFromDll();
[DllImport(pathToDll)]
public static extern int InitGlut();

private void Window_Loaded(object sender, RoutedEventArgs e)
{
    HelloFromDll();
    InitGlut();
}

Answer 1

Set your working directory of your application to the path of the DLL's, this should solve your problem.