D3DKMTCheckOcclusion - NtDoc
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headers
// d3dkmthk.h
NTSTATUS D3DKMTCheckOcclusion(
[in] const D3DKMT_CHECKOCCLUSION *unnamedParam1
);
View the official Windows Driver Kit DDI referenceNo description available.
The D3DKMTCheckOcclusion function verifies whether the client area of a window is occluded.
unnamedParam1 [in]A pointer to a D3DKMT_CHECKOCCLUSION structure that describes parameters for checking occlusion.
D3DKMTCheckOcclusion returns one of the following values:
| Return code | Description |
|---|---|
| STATUS_SUCCESS | The client area of the window is not occluded. |
| STATUS_GRAPHICS_PRESENT_OCCLUDED | The client area of the window is occluded. |
| STATUS_INVALID_PARAMETER | Parameters were validated and determined to be incorrect. |
This function might also return other NTSTATUS values.
The handle to the window that is checked for occlusion must be valid. A window is not occluded if a part of its client area lies on an unowned video present network (VidPn) source, if its client area is an empty rectangular area (RECT), or if desktop composition is running.