ITfRange::IsEmpty method (msctf.h)

The ITfRange::IsEmpty method verifies that the range of text is empty because the start and end anchors occupy the same position.

Syntax

HRESULT IsEmpty(
  [in]  TfEditCookie ec,
  [out] BOOL         *pfEmpty
);

[in] ec

Edit cookie that identifies the edit context. It is obtained from ITfDocumentMgr::CreateContext or ITfEditSession::DoEditSession.

[out] pfEmpty

Pointer to a Boolean value. TRUE indicates the range is empty; FALSE indicates the range is not empty.

This method can return one of these values.

Value	Description
S_OK	The method was successful.
E_FAIL	An unspecified error occurred.
E_INVALIDARG	One or more parameters are invalid.
TF_E_NOLOCK	The value of the ec parameter is an invalid cookie.

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