fgl_winwait()
Displays an interactive message box and waits for user validation.
Syntax
fgl_winwait(
   text STRING )
- text is the message displayed in the message box.
 Use '
\n' to separate lines (not working on ASCII client). 
Usage
The fgl_winwait() function displays a message to the end user and waits until
the user presses the OK button.
Important: 
With front-ends implementing this function with a system dialog box API creating a modal window, the end user will have to close the modal window first, before continuing within the window of another program. Consider using a menu with "dialog" style instead so as not to block other programs.