ExtractPenDataPoints

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.

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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