Conoscere il numero di linee e di colonne costituenti la corrente dimensione di un terminale o console

Per conoscere il numero di linee e di colonne costituenti la corrente dimensione di un terminale o di una console, potremo utilizzare la funzione "iocl()" della libreria C.

Library "libc:6"

Public Struct winsize
  ws_row As Short
  ws_col As Short
  ws_xpixel As Short
  ws_ypixel As Short
End Struct

Private Const STDOUT_FILENO As Integer = 1
Private Const TIOCGWINSZ As Integer = &5413

' int ioctl (int __fd, unsigned long int __request, ...)
' Perform the I/O control operation specified by REQUEST on FD.
Private Extern ioctl(__fd As Integer, __request As Long, w As Winsize) As Integer 


Public Sub Main()

 Dim ws As New Winsize

 ioctl(STDOUT_FILENO, TIOCGWINSZ, ws)

 Print "Linee:   "; ws.ws_row
 Print "Colonne: "; ws.ws_col

End