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IKsControl::KsProperty method

The KsProperty method sets a property or retrieves property information, along with any other defined support operations available on a property set.


HRESULT KsProperty(
  [in]      PKSPROPERTY Property,
  [in]      ULONG       PropertyLength,
  [in, out] LPVOID      PropertyData,
  [in]      ULONG       DataLength,
  [in, out] ULONG       *BytesReturned


Property [in]

Pointer to a structure that describes a property and the request type of the property request. This structure must be either a KSPROPERTY or a structure that contains a KSPROPERTY structure as its first member. An example of a structure that can be pointed to by this member is the KSPROPERTY_VIDEOPROCAMP_S structure.

PropertyLength [in]

Size, in bytes, of the buffer at Property.

PropertyData [in, out]

Pointer to a buffer that contains data for a KSPROPERTY_TYPE_SET, KSPROPERTY_TYPE_UNSERIALIZESET, or KSPROPERTY_TYPE_UNSERIALIZERAW operation, or buffer space that receives data for all other operations.

DataLength [in]

Size, in bytes, of the buffer at PropertyData.

BytesReturned [in, out]

Pointer to a variable that receives the size, in bytes, of the data that KsProperty stores in the buffer at PropertyData. If no data is stored, the size is zero.

Return value

Returns NOERROR if successful; otherwise, returns an error code.


To determine the buffer size that is required for a specific property request, you can call this method with PropertyData set to NULL and DataLength equal to zero. The method returns HRESULT_FROM_WIN32(ERROR_MORE_DATA), and BytesReturned contains the size of the required buffer.


Target platform



Ksproxy.h (include Ksproxy.h)

See also




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