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REC_ Recognition Functions
The REC_ constants specify return values from the GetPenHwEventData and GetPenHwData functions. They are also returned from the obsolete functions Recognize, RecognizeData, and ProcessWriting, and as the wParam value of the WM_RCRESULT message. Return values less than REC_DEBUG are
provided for debugging purposes only and represent abnormal termination.
Constant
| Description
| REC_OK
| This result message to be followed by other results before Recognize terminates. This is a valid wParam value for WM_RCRESULT, but it can never be the return value for Recognize.
| REC_ABORT
| Recognition stopped by a call to EndPenCollection with this value. The lpPnt data is not valid.
| REC_BADHPENDATA
| Returned if HPENDATA cannot be locked or has an invalid header. This value is also returned if HPENDATA has no data in it or if the data is in an incorrect scale or compressed.
| REC_BUFFERTOOSMALL
| Returned by GetPenHwEventData.
| REC_BUSY
| Returned if another task is currently performing recognition.
| REC_DONE
| Returned by RecognizeData upon normal completion.
| REC_NA
| Function not available.
| REC_NOINPUT
| Returned by RecognizeData if the buffer contains no data, or returned by Recognize if recognition ended before any data was collected. For example, a pen-down
stroke may have occurred outside the bounding rectangle before any data was
collected.
| REC_NOTABLET
| Tablet not physically present.
| REC_OOM
| Out-of-memory error.
| REC_OVERFLOW
| Data overflow during execution of the call.
| REC_POINTEREVENT
| Returned if the user makes contact with the tablet surface and lifts the pen
before the pen tip travels a short distance. This value is also returned if the
user does a press-and-hold action; that is, the pen makes contact with the
tablet and remains in that position for a short period of time.
REC_POINTEREVENT informs the application it should begin selection actions
rather than inking or recognition. If REC_POINTEREVENT is returned, no WM_RCRESULT
message is generated and no ink is displayed.
| REC_TERMBOUND
| Recognition ended because of a hit test outside the bounding rectangle. The pntEnd member of RCRESULT is filled with the point causing the stop.
| REC_TERMEX
| Recognition ended because of a hit test inside the exclusion rectangle. The pntEnd member of RCRESULT is filled with the point causing the stop.
| REC_TERMOEM
| Values greater than or equal to 512 reserved for recognizer-specific
termination reasons.
| REC_TERMPENUP
| Recognition ended on pen up. ThepntEnd member of RCRESULT is filled with the pen-up point that terminated recognition.
| REC_TERMRANGE
| Recognition ended because the pen left the proximity range.
| REC_TERMTIMEOUT
| Recognition ended on time-out. (The pen was up con-tinuously for a given
amount of time.)
|
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