instance Pointer to the current plug-in instance. message Pointer the buffer that contains the status message string to display.
You can use this function to make your plug-in user interface simulate the browser `s behavior. When the user moves the cursor over a link in a browser window, Communicator displays information about it in the status message area (on the lower edge of the browser window). If your plug-in has a button or other object that acts as a link when clicked, you can call NPN_Status to display a description or URL when the user moves the cursor over it.
The browser always displays the last status line message it receives, regardless of the message source. Your message is always displayed, but you have no control over how long it stays in the status line before another message replaces it.