Anteckning
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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
);
Parameters
[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.
Return value
This method can return one of these values.
| Value | Description |
|---|---|
|
The method was successful. |
|
An unspecified error occurred. |
|
One or more parameters are invalid. |
|
The value of the ec parameter is an invalid cookie. |
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 |