### IDirectDrawSurface3::UpdateOverlayZOrder

The IDirectDrawSurface3::UpdateOverlayZOrder method sets the z-order of an overlay.

HRESULT UpdateOverlayZOrder(

DWORD dwFlags,

LPDIRECTDRAWSURFACE3 lpDDSReference

);

##### Parameters

dwFlags
  One of the following flags:

  DDOVERZ_INSERTINBACKOF
  | Inserts this overlay in the overlay chain behind the reference overlay.
  DDOVERZ_INSERTINFRONTOF
  | Inserts this overlay in the overlay chain in front of the reference overlay.
  DDOVERZ_MOVEBACKWARD
  | Moves this overlay one position backward in the overlay chain.
  DDOVERZ_MOVEFORWARD
  | Moves this overlay one position forward in the overlay chain.
  DDOVERZ_SENDTOBACK
  | Moves this overlay to the back of the overlay chain.
  DDOVERZ_SENDTOFRONT
  | Moves this overlay to the front of the overlay chain.

lpDDSReference
  Address of the DirectDraw surface to be used as a relative position in the overlay chain. This parameter is needed only for DDOVERZ_INSERTINBACKOF and DDOVERZ_INSERTINFRONTOF.

##### Return Values

If the method succeeds, the return value is DD_OK.

If the method fails, the return value may be one of the following error values:

DDERR_INVALIDOBJECT
DDERR_INVALIDPARAMS
DDERR_NOTAOVERLAYSURFACE

##### See Also

IDirectDrawSurface3::EnumOverlayZOrders