e is used. If an override is not specified, then the parameter value passed to `GetAvailableCoreWebView2BrowserVersionString` is used.

<p>Returns `HRESULT_FROM_WIN32(ERROR_FILE_NOT_FOUND)` if it fails to find an installed WebView2 runtime or non-stable Microsoft Edge installation.

<p>The caller must free the returned string with `CoTaskMemFree`. See [API Conventions](/microsoft-edge/webview2/concepts/win32-api-conventions#strings).

<p></p>
<p>


<p>&lt;see href=&quot;<a href="https://learn.microsoft.com/