// d3dumddi.h

PFND3DDDI_UPDATEOVERLAYCB Pfnd3dddiUpdateoverlaycb;

HRESULT Pfnd3dddiUpdateoverlaycb(
  HANDLE hDevice,
  const D3DDDICB_UPDATEOVERLAY *unnamedParam2
)
{...}
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Windows Driver Kit DDI reference (nc-d3dumddi-pfnd3dddi_updateoverlaycb)

PFND3DDDI_UPDATEOVERLAYCB callback function

Description

The pfnUpdateOverlayCb function modifies a kernel-mode overlay object.

Parameters

`hDevice`

A handle to the display device (graphics context).

`unnamedParam2`

pData [in]

A pointer to a D3DDDICB_UPDATEOVERLAY structure that describes how to modify the overlay.

Return value

pfnUpdateOverlayCb returns one of the following values:

Return code	Description
S_OK	The overlay object was successfully modified.
D3DDDIERR_NOTAVAILABLE	pfnUpdateOverlayCb failed because of a lack of overlay hardware or bandwidth.
E_INVALIDARG	Parameters were validated and determined to be incorrect.
E_OUTOFMEMORY	pfnUpdateOverlayCb could not allocate memory that was required for it to complete.

This function might also return other HRESULT values.

PFND3DDDI_UPDATEOVERLAYCB - NtDoc