// d3dumddi.h

PFND3DDDI_CHECKPRESENTDURATIONSUPPORT Pfnd3dddiCheckpresentdurationsupport;

HRESULT Pfnd3dddiCheckpresentdurationsupport(
  HANDLE hDevice,
  D3DDDIARG_CHECKPRESENTDURATIONSUPPORT *unnamedParam2
)
{...}
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Windows Driver Kit DDI reference (nc-d3dumddi-pfnd3dddi_checkpresentdurationsupport)

PFND3DDDI_CHECKPRESENTDURATIONSUPPORT callback function

Description

Called by the Microsoft Direct3D runtime to request that the user-mode display driver get hardware device capabilities for seamlessly switching to a new monitor refresh rate. Optionally implemented by Windows Display Driver Model (WDDM) 1.3 and later user-mode display drivers.

Parameters

`hDevice`

A handle to the display device (graphics context).

`unnamedParam2`

pPresentDurationSupport [in]

A pointer to a D3DDDIARG_CHECKPRESENTDURATIONSUPPORT structure that contains info on hardware device support for seamlessly switching to a new monitor refresh rate.

Return value

If this routine succeeds, it returns S_OK. The driver should always return a success code.

PFND3DDDI_CHECKPRESENTDURATIONSUPPORT - NtDoc