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GetPenHwEventData
- 0 2.0
Gets the pen data associated with events in a given range.
Note This function is provided only for compatibility with version 1.0 of the Pen
API and will not be supported in future versions. Use DoDefaultPenInput or GetPenInput instead.
REC GetPenHwEventData( UINT wEventRefBeg, UINT wEventRefEnd, LPPOINT lppt, LPVOID lpvOemData, int cPntMax, LPSTROKEINFO lpsi )
Parameters
wEventRefBeg
Beginning pen event.
wEventRefEnd
Ending pen event.
lppt
Address of a an array of POINT structures. The size of the array must be at least sizeof( POINT ) multiplied by cPntMax.
lpvOemData
Buffer to fill with OEM-specific data. This can be NULL if no data is required.
cPntMax
Maximum number of samples to return.
lpsi
Address of a STROKEINFO structure that receives the stroke information, including the count of points
and point state. Also included is the time stamp of the first point returned
in the buffer, which is the number of milliseconds that have elapsed since
Windows started.
Return Value
Returns REC_OK if successful; otherwise, the return value can be one of the
following:
Constant
| Description
| REC_BUFFERTOOSMALL
| The array identified by lppt is not large enough to hold all the points requested.
| REC_PARAMERROR
| Invalid parameter.
|
Comments
This function fetches all data collected from the pen event wEventRefBeg up to but not including the pen event wEventRefEnd. If wEventRefBeg equals wEventRefEnd, GetPenHwEventData retrieves the single pen event associated with wEventRefBeg.
The values for wEventRefBeg and wEventRefEnd are obtained by calling the Windows GetMessageExtraInfo function.
This function can be called directly from an application. If it returns
REC_BUFFERTOOSMALL, no data is returned and the cPnt member of lpsi contains the number of points between wEventRefBeg and wEventRefEnd. If REC_OK is returned, the cPnt member contains the number of valid points placed in the array at lppt.
See Also
STROKEINFO
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