Initial WebM release
diff --git a/usage_cx.dox b/usage_cx.dox
new file mode 100644
index 0000000..980a034
--- /dev/null
+++ b/usage_cx.dox
@@ -0,0 +1,14 @@
+/*! \page usage_encode Encode
+
+ The vpx_codec_encode() function is at the core of the decode loop. It
+ processes raw images passed by the application, producing packets of
+ compressed data. The <code>deadline</code> parameter controls the amount
+ of time in microseconds the encoder should spend working on the frame. For
+ more information on the <code>deadline</code> parameter, see
+ \ref usage_deadline.
+
+
+ \ref samples
+
+
+*/