This API is used to manipulate and query virtual text in an installer or uninstaller.
Specifies the action the API should take. Possible values are:
Set the type of a virtual text. Type affects how some virtual text is treated within the installer.
Specifies the type to assign to the virtual text. The current available types are: boolean and directory. A boolean type means that the value saved in the virtual text will always be a 0 or 1 based on what is set. A directory type means that the virtual text will automatically be converted to the proper representation for the current platform.