答案（C#中的原始代码：Rotate picture in Winforms）+由于模糊和内存使用量增加，因此此时无用：

private: System::Void spinButton_Click(System::Object^ sender, System::EventArgs^ e) {
        pictureBox1->Image = RotateImage(pictureBox1->Image, 15);
    }
    public: Image^ RotateImage(Image^ img, float rotationAngle)
    {
        //create an empty Bitmap image
        Image^ bmp = Image::FromFile("rouletteWheel.png");

        //turn the Bitmap into a Graphics object
        Graphics^ gfx = Graphics::FromImage(bmp);

        //now we set the rotation point to the center of our image
        gfx->TranslateTransform((float)bmp->Width / 2, (float)bmp->Height / 2);

        //now rotate the image
        gfx->RotateTransform(rotationAngle);

        gfx->TranslateTransform(-(float)bmp->Width / 2, -(float)bmp->Height / 2);

        //set the InterpolationMode to HighQualityBicubic so to ensure a high
        //quality image once it is transformed to the specified size               
        gfx->InterpolationMode = System::Drawing::Drawing2D::InterpolationMode::HighQualityBicubic;
        //now draw our new image onto the graphics object

        gfx->DrawImage(img, 0, 0);

        //dispose of our Graphics object
        gfx->~Graphics();

        //return the image
        return bmp;
    }

但有一个问题，经过几次旋转图像变得模糊.