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ITfCategoryMgr::FindClosestCategory method (msctf.h)

  • Article

Finds the category closest to the specified GUID from a list of categories.

Syntax

HRESULT FindClosestCategory(
  [in]  REFGUID    rguid,
  [out] GUID       *pcatid,
  [in]  const GUID **ppcatidList,
  [in]  ULONG      ulCount
);

Parameters

[in] rguid

Specifies the address of the GUID for which to find the closest category.

[out] pcatid

Pointer to the GUID that receives the CATID for the closest category.

[in] ppcatidList

Pointer to a pointer that specifies an array of CATIDs to search for the closest category.

[in] ulCount

Specifies the number of elements in the array of the ppcatidList parameter.

Return value

This method can return one of these values.

Value Description
S_OK
 The method obtained the closest category from the list of categories, or the method was unable to obtain a category from the list and indicates this with a pcatid parameter pointer to GUID_NULL.
S_FALSE
 The method was unable to find a category for the specified GUID and signals this with a pcatid parameter pointer to GUID_NULL.
E_FAIL
 The method cannot access the internal table.
E_INVALIDARG
 The specified pcatid parameter was NULL on input, or the list of categories contained a NULL element when the ulCount parameter was nonzero.
E_OUTOFMEMORY
 There is insufficient memory to perform the operation.

Remarks

The closest category to a GUID is chosen in one of two modes. In the first mode, the method receives a non-empty category list. It chooses the first matching CATID from that list or GUID_NULL if the list does not contain a category that contains the GUID . In the second mode, it receives an empty category list. It chooses the first category that contains the GUID or GUID_NULL if no category contains the GUID .

Requirements

Requirement Value
Minimum supported client Windows 2000 Professional [desktop apps | UWP apps]
Minimum supported server Windows 2000 Server [desktop apps | UWP apps]
Target Platform Windows
Header msctf.h
DLL Msctf.dll
Redistributable TSF 1.0 on Windows 2000 Professional

See also

ITfCategoryMgr interface, ITfCategoryMgr::EnumCategoriesInItem, ITfCategoryMgr::EnumItemsInCategory, ITfCategoryMgr::RegisterCategory