Provided by: allegro4-doc_4.4.2-10_all bug


       request_refresh_rate  -  Requests  a  specific  refresh  rate  during graphic mode switch.
       Allegro game programming library.


       #include <allegro.h>

       void request_refresh_rate(int rate);


       Requests that the next call to set_gfx_mode() try to use the specified  refresh  rate,  if
       possible. Not all drivers are able to control this at all, and even when they can, not all
       rates will be possible on all hardware, so the actual settings may differ  from  what  you
       requested.  After you call set_gfx_mode(), you can use get_refresh_rate() to find out what
       was actually selected. At the moment only the DOS VESA 3.0, X DGA  2.0  and  some  Windows
       DirectX drivers support this function. The speed is specified in Hz, eg. 60, 70. To return
       to the normal default selection, pass a rate value of zero. Example:

          if (set_gfx_mode(GFX_AUTODETECT, 640, 480, 0, 0) != 0)
             abort_on_error("Couldn't set graphic mode!");
          if (get_refresh_rate() != 60)
             abort_on_error("Couldn't set refresh rate to 60Hz!");


       set_gfx_mode(3alleg4), get_refresh_rate(3alleg4)