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EndPenInputHRC
- 0
Informs a recognizer that pen data input has been terminated. A recognizer
must export this function.
int EndPenInputHRC( HRC hrc )
Parameters
hrc
Handle to the HRC object for the recognizer.
Return Value
Returns HRCR_OK if successful; otherwise, returns one of the following
negative values:
Constant
| Description
| HRCR_MEMERR
| Insufficient memory.
| HRCR_ERROR
| Invalid parameter or other error.
|
Comments
EndPenInputHRC does not instruct the recognizer to complete recognition; an application must
call ProcessHRC to do that. However, an application that does not use DoDefaultPenInput must call EndPenInputHRC when it detects that input has finished. (DoDefaultPenInput calls EndPenInputHRC internally.)
The recognizer can terminate open-ended states and reduce ambiguity in
searches when it knows that no more ink will arrive. For example, the recognizer can
keep various options open for possible delayed strokes that can modify a
character. EndPenInputHRC tells the recognizer that no more delayed strokes will arrive.
After calling EndPenInputHRC for an HRC, an application should cease adding pen input into the HRC. Some recognizers, such as the Microsoft Handwriting Recognizer (GRECO.DLL),
do not accept late pen input. If the application calls AddPenInputHRC after having called EndPenInputHRC for the same HRC, the Microsoft Handwriting Recognizer returns HRCR_ERROR.
Other recognizers may differ. With such recognizers, a client may continue to
add pen input without error into a recognition context, even after having
called EndPenInputHRC. However, doing so is not efficient. In the worst case, the recognizer may be
forced to reprocess all of the pen data from the beginning.
For an example of a normal termination sequence, see the code sample in GetSymbolsHRCRESULT.
See Also
ProcessHRC, DoDefaultPenInput
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