diff --git a/Stereo3D.md b/Stereo3D.md
index 9e22b70..50288aa 100644
--- a/Stereo3D.md
+++ b/Stereo3D.md
@@ -4,16 +4,16 @@
 
 This function filled out a default ``STEREO_PARAMETERS`` which you could then modify before passing on to the other functions.
 
-    void StereoCreateDefaultParameters(_Out_ STEREO_PARAMETERS* pStereoParameters);
+    void StereoCreateDefaultParameters(STEREO_PARAMETERS& pStereoParameters);
 
 These functions compute the stereo projection matrices. You'd call it twice, once for ``STEREO_CHANNEL_LEFT`` and once for ``STEREO_CHANNEL_RIGHT`` to get two matrices. If you pass ``nullptr`` for the ``pStereoParameters`` parameter, you get the values obtained from ``StereoCreateDefaultParameters``.
 
-    XMMATRIX StereoProjectionFovLH(_In_opt_ const STEREO_PARAMETERS* pStereoParameters,
+    XMMATRIX StereoProjectionFovLH(const STEREO_PARAMETERS* pStereoParameters,
         STEREO_CHANNEL Channel,
         float FovAngleY, float AspectRatio, float NearZ, float FarZ,
         STEREO_MODE StereoMode = STEREO_MODE_NORMAL);
 
-    XMMATRIX StereoProjectionFovRH(_In_opt_ const STEREO_PARAMETERS* pStereoParameters,
+    XMMATRIX StereoProjectionFovRH(const STEREO_PARAMETERS* pStereoParameters,
         STEREO_CHANNEL Channel,
         float FovAngleY, float AspectRatio, float NearZ, float FarZ,
         STEREO_MODE StereoMode = STEREO_MODE_NORMAL);