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Description
Maybe just mention the using namespace before Step 3.
using namespace Microsoft::WRL;
Otherwise there's an undefined Callback error since the example code isn't namespaced...
// Step 3 - Create a single WebView within the parent window
// Locate the browser and set up the environment for WebView
CreateWebView2EnvironmentWithDetails(nullptr, nullptr, nullptr,
Callback<IWebView2CreateWebView2EnvironmentCompletedHandler>(
[hWnd](HRESULT result, IWebView2Environment* env) -> HRESULT {