* This function will return the reference to the present executable for the file extension. * An empty return value indicates that there's no executable for that extension present. * We're not interested in the cause of a failure. However, that info *could* be given. * Parameters: * tcExtension Obliged parameter. File extension that triggers the executable. E.g. "htm", "txt", "app"I think, instead of "obliged" it should be "required". I don't think, the word "obliged" could be used in this context.