VioShowBuf (FAPI)

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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.

Bindings

C

#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