This call updates the physical display buffer with the logical video buffer (LVB).

VioShowBuf (Offset, Length, VioHandle)

;Offset (USHORT) - input : Starting offset within the logical video buffer at which the update to the screen is to start. ;Length (USHORT) - input : Length of the area to be updated to the screen. ;VioHandle (HVIO) - input : This must be zero unless the caller is a Presentation Manager application, in which case it must be the value returned by VioGetPs.

rc (USHORT) - return Return code descriptions are:

• 0 NO_ERROR
• 355 ERROR_VIO_MODE
• 430 ERROR_VIO_ILLEGAL_DURING_POPUP
• 436 ERROR_VIO_INVALID_HANDLE
• 465 ERROR_VIO_DETACHED

VioShowBuf is ignored unless it is issued by a process that has previously called VioGetBuf and that is currently executing in the foreground.

This function updates the display with the Advanced VIO presentation space.

#define INCL_VIO
 
USHORT  rc = VioShowBuf(Offset, Length, VioHandle);
 
USHORT           Offset;        /* Offset into LVB */
USHORT           Length;        /* Length */
HVIO             VioHandle;     /* Video handle */
 
USHORT           rc;            /* return code */

EXTRN  VioShowBuf:FAR
INCL_VIO            EQU 1
 
PUSH   WORD    Offset        ;Offset into LVB
PUSH   WORD    Length        ;Length
PUSH   WORD    VioHandle     ;Video handle
CALL   VioShowBuf
 
Returns WORD

Text based on http://www.edm2.com/index.php/VioShowBuf_(FAPI)