| folder | Folder type where the file is located. |
| relativeFilePath | Relative file path inside the specified folder. |
| showWarning | Shows user a warning that application will be switched. |
Launches the default app associated with specified file.
Note: if the application associated with file is the same as the one performing the launch, Windows won't open a new application, instead it will simply invoke OnActivated event in App.xaml.[cs/cpp] file.