### IDirectDrawSurface3::Flip

The IDirectDrawSurface3::Flip method makes the surface memory associated with the DDSCAPS_BACKBUFFER surface become associated with the front-buffer surface.

HRESULT Flip(

LPDIRECTDRAWSURFACE3 lpDDSurfaceTargetOverride,

DWORD dwFlags

);

##### Parameters

lpDDSurfaceTargetOverride
  Address of another surface in the flipping chain that will be flipped to. The specified surface must be a member of the flipping chain. The default for this parameter is NULL, in which case DirectDraw cycles through the buffers in the order they are attached to each other.
dwFlags
  Flags specifying flip options.

  DDFLIP_EVEN
  | For use only when displaying video in an overlay surface. The new surface contains data from the even field of a video signal. This flag cannot be used with the DDFLIP_ODD flag.
  DDFLIP_ODD
  | For use only when displaying video in an overlay surface. The new surface contains data from the odd field of a video signal. This flag cannot be used with the DDFLIP_EVEN flag.
  DDFLIP_WAIT
  | Typically, if the flip cannot be set up because the state of the display hardware is not appropriate, the DDERR_WASSTILLDRAWING error returns immediately and no flip occurs. Setting this flag causes the method to continue trying to flip if it receives the DDERR_WASSTILLDRAWING error from the HAL. The method does not return until the flipping operation has been successfully set up, or if another error, such as DDERR_SURFACEBUSY, is returned.

##### 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_GENERIC
DDERR_INVALIDOBJECT
DDERR_INVALIDPARAMS
DDERR_NOFLIPHW
DDERR_NOTFLIPPABLE
DDERR_SURFACEBUSY
DDERR_SURFACELOST
DDERR_UNSUPPORTED
DDERR_WASSTILLDRAWING

##### Remarks

This method can be called only for a surface that has the DDSCAPS_FLIP and DDSCAPS_FRONTBUFFER capabilities. The display memory previously associated with the front buffer is associated with the back buffer.

The lpDDSurfaceTargetOverride parameter is used in rare cases when the back buffer is not the buffer that should become the front buffer. Typically this parameter is NULL.

The IDirectDrawSurface3::Flip method will always be synchronized with the vertical blank. If the surface has been assigned to a video port, this method updates the visible overlay surface and the video port's target surface.

For more information, see Flipping Surfaces.

##### See Also

IDirectDrawSurface3::GetFlipStatus