Synopsis:
   $winnum()

Technical:
   This returns the window number of the current window.  It takes no
   arguments (and in fact ignores any passed).  This value will always
   match the value of STATUS_WINDOW in the status bar.

Practical:
   This function is mainly useful for scripts, allowing them to know at any
   given time what the current window is.

Returns:
   current window number

Examples:
   $winnum()               returns number of current window

See Also:
   set(4) status_window; winnam(6)