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VioShowBuf

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Revision as of 17:19, 10 June 2016 by Martini (talk | contribs) (Created page with "==Description== Updates the physical display buffer with the logical video buffer (LVB). ==Syntax== <PRE> #define INCL_VIO #include <os2.h> ULONG OffSet; /* Offset...")
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Description

Updates the physical display buffer with the logical video buffer (LVB).

Syntax

#define INCL_VIO
#include <os2.h>

ULONG     OffSet;     /*  Offset into the LVB. */
ULONG     Length;
HVIO      VioHandle;  /*  VIO presentation-space handle. */
APIRET    rc;         /*  Return code */

rc = VioShowBuf(OffSet, Length, VioHandle);

Parameters

OffSet (ULONG) - input
Offset into the LVB.

Starting offset, within the LVB, where the update to the screen is to start.

Length (ULONG) - input
Length of the area to be updated to the screen.
VioHandle (HVIO) - input

VIO presentation-space handle.

This must be 0, unless the caller is a Presentation Manager application; in this case, it must be the value returned by VioCreatePS.

Return Code

rc (APIRET) - returns

Return code descriptions are:

  • 0 NO_ERROR
  • 355 ERROR_VIO_MODE
  • 421 ERROR_VIO_INVALID_PARMS
  • 430 ERROR_VIO_ILLEGAL_DURING_POPUP
  • 436 ERROR_VIO_INVALID_HANDLE

Remarks

VioShowBuf is ignored unless it is issued by a process that is currently executing in the foreground or in a window.

Example Code

Related Functions

  • [[OS2 API:CPI:
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