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ExtractPenDataPoints
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Extracts points from a specified stroke in an HPENDATA object.
int ExtractPenDataPoints( HPENDATA hpndt, UINT iStrk, UINT iPnt, UINT cPnts, LPPOINT lppt, LPVOID lpvOem, UINT fuOption )
Parameters
hpndt
Handle to an HPENDATA object.
iStrk
Zero-based index of the stroke to remove points from.
iPnt
Zero-based index to the first point to remove.
cPnts
Count of points to remove. If this value is greater than the number of points
after iPnt, all the points from iPnt to the last point of the stroke are removed. ExtractPenDataPoints fails if iPnt is greater then the number of points in the stroke.
lppt
Array of POINT structures that receives the extracted points. This must be large enough to
hold cPnts points.
lpvOem
Buffer to put extracted OEM data if it exists, or NULL. This must be large
enough to hold cPnts OEM packets.
fuOption
Flags. This value can be EPDP_REMOVE to remove the points from the stroke in
the pen data object.
Return Value
Returns PDR_OK if successful; otherwise, the return value can be one of the
following negative values:
Constant
| Description
| PDR_COMPRESSED
| Pen data is compressed.
| PDR_ERROR
| Parameter or other unspecified error.
| PDR_MEMERR
| Out of memory.
| PDR_STRKINDEXERR
| Invalid stroke index.
| PDR_PNTINDEXERR
| Invalid point index.
| PDR_VERSIONERR
| Could not convert old pen data object.
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Comments
ExtractPenDataPoints extracts points (and OEM data, if any) from a specified stroke of the pen
data object specified by hpndt. It copies the extracted points and the OEM data to the buffers pointed to by lppt and lpvOem.
Use ExtractPenDataStrokes to extract strokes from the pen data object or RemovePenDataStrokes to remove strokes from the pen data object.
See Also
InsertPenDataPoints, InsertPenDataStroke, RemovePenDataStrokes
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