// d3dumddi.h

PFND3DDDI_UPDATEOVERLAY Pfnd3dddiUpdateoverlay;

HRESULT Pfnd3dddiUpdateoverlay(
  HANDLE hDevice,
  const D3DDDIARG_UPDATEOVERLAY *unnamedParam2
)
{...}
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Windows Driver Kit DDI reference (nc-d3dumddi-pfnd3dddi_updateoverlay)

PFND3DDDI_UPDATEOVERLAY callback function

Description

The UpdateOverlay function reconfigures or moves an overlay that is being displayed.

Parameters

`hDevice`

A handle to the display device (graphics context).

`unnamedParam2`

pData [in]

A pointer to a D3DDDIARG_UPDATEOVERLAY structure that describes how to reconfigure the overlay.

Return value

UpdateOverlay returns one of the following values:

Return code	Description
S_OK	The overlay is successfully modified.
E_OUTOFMEMORY	UpdateOverlay could not complete because of insufficient memory.
D3DDDIERR_NOTAVAILABLE	UpdateOverlay could not complete because insufficient bandwidth was available or the requested overlay hardware was unavailable.
D3DDDIERR_UNSUPPORTEDOVERLAYFORMAT	The specified overlay format is not supported by the overlay hardware.
D3DDDIERR_UNSUPPORTEDOVERLAY	The overlay hardware is not supported for the specified size and display mode.

Remarks

Overlays are independent from the resources that are displayed by using the overlays.

PFND3DDDI_UPDATEOVERLAY - NtDoc