Updated Home (markdown)

Home.md

@@ -9,6 +9,22 @@ http://go.microsoft.com/fwlink/?LinkID=615560
 
 See [this post](https://aka.ms/Kjp2dz).
 
+# Headers
+
+```cpp
+#include <DirectXMath.h>
+#include <DirectXCollision.h>
+#include <DirectXColors.h>
+#include <DirectXPackedVector.h>
+```
+
+# Namespace
+All the functions in the library are in the **DirectX** C++ namespace. The packed vector types and functions are in the **DirectX::PackedVector** C++ namespace.
+
+```cpp
+using namespace DirectX;
+```
+
 # Documentation
 The DirectXMath library is documented on [Microsoft Docs](https://docs.microsoft.com/en-us/windows/desktop/dxmath/directxmath-portal).