VioShowBuf (FAPI)

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

Syntax
VioShowBuf (Offset, Length, VioHandle)

Parameters

 * 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.

Return Code

 * 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

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

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

C

 * 1) 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 */ 

MASM
 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 

Related Functions

 * VioGetBuf