Returns the address of the logical video buffer (LVB).

#define INCL_VIO
#include <os2.h>

PULONG    LVBPtr;     /*  Pointer to the logical video buffer address. */
PULONG    Length;     /*  Pointer to the length of the buffer, in bytes. */
HVIO      VioHandle;  /*  Presentation-space handle. */
APIRET    rc;         /*  Return code. */

rc = VioGetBuf(LVBPtr, Length, VioHandle);