x_message
x_message —  X window message  
Calling sequence
[num]=x_message(strings [,buttons])   
Parameters
| strings   | : vector of characters strings to be displayed | 
| buttons   | : character string or 2 vector of character strings which specifies button(s) name(s). Default value is "Ok" | 
| num   | : number  of button clicked (if 2 buttons are specified) | 
Description
    for displaying a message (diagnostic,... ) and waiting for
    an answer (button click). The function returns only after a click on a
    button.
Examples
 gain=0.235;x_message('value of gain is :'+string(gain))
 x_message(['singular matrix';'use least squares'])
 r=x_message(['Your problem is ill conditioned';
             'continue ?'],['Yes','No'])
 
  See also
x_dialog, x_mdialog, x_message_modeless