VioSavRedrawUndo

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Allows one thread within a process to cancel a VioSavRedrawWait issued by another thread within the same process.

Syntax

VioSavRedrawUndo(OwnerIndic, KillIndic, VioHandle)

Parameters

OwnerIndic (ULONG) - input 
Ownership indicator

Indicates whether the thread issuing VioSavRedrawUndo wants ownership of VioSavRedrawUndo to be reserved for its process.

0   Reserve ownership. 
1   Give up ownership. 
KillIndic (ULONG) - input 
Terminate indicator

Indicates whether the thread (with the outstanding VioSavRedrawUndo) should return an error code or be terminated.

0   Return error code. 
1   Terminate thread. 
VioHandle (HVIO) - input 
Reserved. Must be 0.

Return Code

rc (APIRET) - returns

VioSavRedrawUndo returns one of the following values:

  • 0 NO_ERROR
  • 421 ERROR_VIO_INVALID_PARMS
  • 422 ERROR_VIO_FUNCTION_OWNED
  • 428 ERROR_VIO_NO_SAVE_RESTORE_THD
  • 430 ERROR_VIO_ILLEGAL_DURING_POPUP

Remarks

The issuing thread can reserve ownership of VioSavRedrawWait for its process or give it up. The thread whose VioSavRedrawWait was canceled is optionally terminated. VioSavRedrawUndo can be issued only by a thread within the same process that owns VioSavRedrawWait.