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ITfKeystrokeMgr::PreserveKey method

Syntax

C++


HRESULT PreserveKey(
  [in]       TfClientId      tid,
  [in]       REFGUID         rguid,
  [in] const TF_PRESERVEDKEY *prekey,
  [in] const WCHAR           *pchDesc,
  [in]       ULONG           cchDesc
);

Parameters

tid [in]: Contains the client identifier of the TSF text service. This value is passed to the TSF text service in its ITfTextInputProcessor::Activate method.
rguid [in]: Contains the command GUID of the preserved key. This value is passed to the TSF text service ITfKeyEventSink::OnPreservedKey method to identify the preserved key when the preserved key is activated.
prekey [in]: Pointer to a TF_PRESERVEDKEY structure that specifies the preserved key. The uVKey member contains the virtual key code and the uModifiers member identifies the modifiers of the preserved key.
pchDesc [in]: Pointer to a Unicode string that contains the description of the preserved key. This cannot be NULL unless cchDesc is zero.
cchDesc [in]: Specifies the number of characters in pchDesc. Pass zero for this parameter if no description is required.

Return value

This method can return one of these values.

Value	Description
S_OK	The method was successful.
TF_E_ALREADY_EXISTS	The preserved key is registered.
E_INVALIDARG	One or more parameters are invalid.
E_OUTOFMEMORY	A memory allocation error occurred.
E_FAIL	An unspecified error occurred.

Remarks

Preserved keys are registered by TSF text services and provide keyboard shortcuts to common commands implemented by the TSF text service.

Requirements

Minimum supported client	Windows 2000 Professional [desktop apps \| Windows Store apps]
Minimum supported server	Windows 2000 Server [desktop apps \| Windows Store apps]
Redistributable	TSF 1.0 on Windows 2000 Professional
Header	Msctf.h
IDL	Msctf.idl
DLL	Msctf.dll