NAME
====
  vg_key_update() - get input from key and mouse


SYNOPSIS
========
  int vg_key_update(void)


DESCRIPTION
===========
  Reads in all keystrokes and mouse-events,
  which then can be checked with vg_key_pressed() and vg_mouse_pressed().

  If using network, this function also sends keystrokes of a client
  and receives new data.
  Then a return value of -1 indicates that the network was closed.


RETURN VALUE
============
  Normally it returns 0.
  Only if network is used, a return value of -1 indicates
  that the network was closed.


SEE ALSO
========
  Index
  Understanding window and key
  vg_key_discard()
  vg_key_pressed()
  vg_mouse_found()
  vg_mouse_x()
  vg_mouse_y()
  vg_mouse_pressed()
  vg_mouse_speed()