Do not create hooks that call external functions. Functions that call other Windows applications, such as a message box, can stop the Rational ClearQuest Web client.
For example, if a message box function runs on a Rational ClearQuest server, the message box opens on the server screen. Because the user cannot click OK on the server, the Web application is left waiting. To solve the problem, you must reboot the server.
If record script hooks return a string value, that string is displayed to the user.