为什么窗口没有渲染属性选择..

痞子?

求高手指导啊,初学OGRE,网上看到创建窗口代码如下:
#include "ExampleApplication.h"

class TutorialApplication : public ExampleApplication
{
protected:
public:
    TutorialApplication()
    {
    }

    ~TutorialApplication()
    {
    }
protected:
    void createScene(void)
    {
    }
};

#if OGRE_PLATFORM == PLATFORM_WIN32 || OGRE_PLATFORM == OGRE_PLATFORM_WIN32
#define WIN32_LEAN_AND_MEAN
#include "windows.h"

INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR strCmdLine, INT )
#else
int main(int argc, char **argv)
#endif
{
    // Create application object
    TutorialApplication app;

    try {
        app.go();
    } catch( Exception& e ) {
#if OGRE_PLATFORM == PLATFORM_WIN32
        MessageBox( NULL, e.getFullDescription().c_str(), "An exception has occured!", MB_OK | MB_IConERROR | MB_TASKMODAL);
#else
        fprintf(stderr, "An exception has occured: %s\n", e.getFullDescription().c_str());
#endif
    }

    return 0;
}
编译通过,显示出窗口渲染设置,为没有渲染选择呢,选择DX或者OPENGL渲染方式啊.