VioShowBuf

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:
• 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.

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