ICatInformation::IsClassOfCategories

Determines if a class implements one or more categories. If the class requires a category not listed in rgcatidReq, it is not included in the enumeration.

HRESULT IsClassOfCategories(

REFCLSID rclsid,

//Class ID of the class to query

ULONG cImplemented,

//Number of category IDs in the rgcatidImpl array

CATID rgcatidImpl,

//Array of category identifiers

ULONG cRequired,

//Number of category IDs in the rgcatidReq array

CATID rgcatidReq

//Array of category identifiers

);

Parameters

rclsid: [in] The class ID of the relevent class to query.
cImplemented: [in] The number of category IDs in the rgcatidImpl array. This value cannot be zero. If this value is ((ULONG) -1), the implemented categories are not tested.
rgcatidImpl: [in] An array of category identifiers.
cRequired: [in] The number of category IDs in the rgcatidReq array. This value can be zero. If this value is ((ULONG) -1), the required categories are not tested.
rgcatidReq: [in] An array of category identifiers.

Return Values

S_OK: rclsid is of category rcatid.
S_FALSE: rclsid is not of category rcatid.

REFCLSID rclsid,	//Class ID of the class to query
ULONG cImplemented,	//Number of category IDs in the rgcatidImpl array
CATID rgcatidImpl,	//Array of category identifiers
ULONG cRequired,	//Number of category IDs in the rgcatidReq array
CATID rgcatidReq	//Array of category identifiers
);