Notifies a graphics mode application when it must save or redraw its screen image.

#define INCL_VIO
#include <os2.h>

ULONG     SaveRedrawIndic;  /*  Save/redraw indicator. */
PULONG    NotifyType;       /*  Notify type (returned). */
HVIO      VioHandle;        /*  Reserved.  Must be 0. */
APIRET    rc;               /*  Return code. */

rc = VioSavRedrawWait(SaveRedrawIndic, NotifyType,
       VioHandle);