// d3dumddi.h

PFND3DDDI_CREATEOVERLAY Pfnd3dddiCreateoverlay;

HRESULT Pfnd3dddiCreateoverlay(
  HANDLE hDevice,
  D3DDDIARG_CREATEOVERLAY *unnamedParam2
)
{...}
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Windows Driver Kit DDI reference (nc-d3dumddi-pfnd3dddi_createoverlay)

PFND3DDDI_CREATEOVERLAY callback function

Description

The CreateOverlay function allocates overlay hardware and makes the overlay visible.

Parameters

`hDevice`

A handle to the display device (graphics context).

`unnamedParam2`

pData [in, out]

A pointer to a D3DDDIARG_CREATEOVERLAY structure that describes the overlay.

Return value

CreateOverlay returns one of the following values:

Return code	Description
S_OK	The overlay is successfully created.
E_OUTOFMEMORY	CreateOverlay could not complete because of insufficient memory.
D3DDDIERR_NOTAVAILABLE	CreateOverlay 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_CREATEOVERLAY - NtDoc