Explain how to use static libraries.

vsix/ProjectTemplates/VC/Windows Universal/StaticLibrary/readme.txt

@@ -5,8 +5,29 @@
 This project demonstrates how to get started authoring Windows Runtime 
 classes directly with standard C++, using the C++/WinRT SDK component 
 to generate implementation headers from interface (IDL) files.  The
-generated Windows Runtime component binary and WinMD files should then
-be bundled with the Universal Windows Platform (UWP) app consuming them.
+generated static library should be consumed by a single Runtime Component 
+or App project and the and types will automatically be added to that 
+binary.
+To be able to instantiate types from the static library you need to 
+update the activation factory in the consuming binary to call the 
+activation factory exposed by this static library using code similar to:
+
+void* __stdcall $projectname$_get_activation_factory(
+    std::wstring_view const& name);
+
+void* __stdcall winrt_get_activation_factory(
+    std::wstring_view const& name)
+{
+    void* factory = $projectname$_get_activation_factory(name);
+    if (factory)
+    {
+        return factory;
+    }
+    
+    /* call other activation factories */
+
+    return nullptr;
+}
 
 Steps:
 1. Create an interface (IDL) file to define your Windows Runtime class,