// d3dkmddi.h

DXGKDDI_VIDPNTARGETMODESET_GETNUMMODES DxgkddiVidpntargetmodesetGetnummodes;

NTSTATUS DxgkddiVidpntargetmodesetGetnummodes(
  IN_CONST_D3DKMDT_HVIDPNTARGETMODESET hVidPnTargetModeSet,
  OUT_PSIZE_T_CONST pNumTargetModes
)
{...}
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Windows Driver Kit DDI reference (nc-d3dkmddi-dxgkddi_vidpntargetmodeset_getnummodes)

DXGKDDI_VIDPNTARGETMODESET_GETNUMMODES callback function

Description

The pfnGetNumModes function returns the number of target modes in a specified VidPN target mode set.

Parameters

`hVidPnTargetModeSet`

A handle to a VidPN target mode set object. The display miniport driver previously obtained this handle by calling the pfnAcquireTargetModeSet function of the DXGK_VIDPN_INTERFACE interface.

`pNumTargetModes`

A pointer to a SIZE_T-typed variable that receives the number of target modes in the set.

Return value

The pfnGetNumModes function returns one of the following values:

Return code	Description
STATUS_SUCCESS	The function succeeded.
STATUS_GRAPHICS_INVALID_VIDPN_TARGETMODESET	The handle supplied in hVidPnTargetModeSet was invalid.

Remarks

The D3DKMDT_HVIDPNTARGETMODESET data type is defined in D3dkmdt.h.

DXGKDDI_VIDPNTARGETMODESET_GETNUMMODES - NtDoc